SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                _______________

                                  SCHEDULE TO

           Tender Offer Statement under Section 14(d)(1) or 13(e)(1)
                     of the Securities Exchange Act of 1934

                               (Amendment No. 7)

                            LITTON INDUSTRIES, INC.

                       (Name of Subject Company (issuer))

                          NORTHROP GRUMMAN CORPORATION
                             (formerly NNG, Inc.)
                             LII ACQUISITION CORP.
                     Northrop Grumman Systems Corporation
                    (formerly Northrop Grumman Corporation)

                       (Name of Filing Persons (offeror))

                    Common Stock, Par Value $1.00 Per Share
                         (including associated rights)
                         (Title of Class of Securities)

                                 538021 10 6
                     (CUSIP Number of Class of Securities)

       Series B $2 Cumulative Preferred Stock, Par Value $5.00 Per Share

                         (Title of Class of Securities)

                                  538021 40 3

                     (CUSIP Number of Class of Securities)

                                 W. Burks Terry
                  Corporate Vice President and General Counsel
                          Northrop Grumman Corporation
                             1840 Century Park East
                         Los Angeles, California  90067
                                 (310) 553-6262

  (Name, Address and Telephone Number of Person Authorized to Receive Notices
        and Communications on Behalf of the Person(s) Filing Statement)

                                    Copy to:

                                Andrew E. Bogen
                         Gibson, Dunn & Crutcher LLP
                            333 South Grand Avenue
                      Los Angeles, California  90071-3197
                                (213) 229-7159

[ ] Check the box if the filing relates solely to preliminary communications
    made before the commencement of a tender offer.

[ ] Check the appropriate boxes to designate any transactions to which this
    statement relates:

      [X] third party tender offer           [ ] going-private transaction
              subject to Rule 14d-1                    subject to Rule 13e-3

      [ ] issuer tender offer                [ ] amendment to Schedule 13D
              subject to Rule 13e-4                    under Rule 13d-2


     Check the following box if the filing is a final amendment reporting the
     results of the tender offer.   [X]



        Northrop Grumman Systems Corporation (formerly Northrop Grumman
Corporation), a Delaware corporation ("Parent" or "Systems"), LII Acquisition
Corp., and Northrop Grumman Corporation (formerly NNG, Inc.) ("Northrop"),
hereby amend and supplement their Tender Offer Statement on Schedule TO
originally filed on January 5, 2001 (the "Schedule TO"), as subsequently amended
from time to time, with respect to the Offer to Purchase or Exchange (the
"Offer") (a) all of the issued and outstanding shares of common stock, par value
$1.00 per share (the "Common Stock") of Litton Industries, Inc., a Delaware
corporation (the "Company"), together with any associated rights to purchase
preferred stock of the Company (together with the Common Stock, the "Common
Shares") and (b) all of the outstanding shares of Series B $2 Cumulative
Preferred Stock, par value $5.00 per share (the "Preferred Shares"), of the
Company.


                                       2


Items 1 through 11

   As permitted by General Instruction F to Schedule TO, the information set
forth in Amendment No. 2 to the Registration Statement on Form S-4 (Commission
file No. 333-54800) filed with the SEC by Northrop Grumman Corporation (formerly
NNG, Inc.) on March 27, 2001 is incorporated by reference into this Tender
Offer Statement on Schedule TO.

Item 8.   Interest in Securities of the Subject Company

     Item 8 of the Schedule TO is hereby amended and supplemented to include the
following information:

Expiration of the Offer and Results

     The Offer expired at Midnight, New York City time, on Monday, April 2,
2001. EquiServe Trust Company N.A., the Depositary for the Offer, has informed
Northrop that at that time, 44,660,440 Common Shares and 240,632 Preferred
Shares had been validly tendered and not properly withdrawn by the Company's
stockholders. At approximately 12:30 a.m., New York City Time, on Tuesday, April
3, 2001, Northrop accepted for purchase or exchange all of the Common Shares and
Preferred Shares validly tendered and not properly withdrawn prior to the
expiration of the Offer. Based on information provided to Northrop by the
Company and Bank of New York, the Company's transfer agent, there were
45,900,722 Common Shares and 410,643 Preferred Shares outstanding as of March
28, 2001. Therefore, the number of Common Shares and Preferred Shares accepted
for purchase or exchange by Northrop represent approximately 97.3% and 58.6% of
the Common Shares and Preferred Shares outstanding as of March 28, 2001,
respectively.

     Based on these numbers, Northrop will issue the full allotment of
13,000,000 shares of Northrop common stock and 3,500,000 shares of Northrop
preferred stock available for issuance pursuant to the Offer.  In addition, the
number of shares of Northrop common stock and Northrop preferred stock issuable
to the Company's stockholders requesting such securities will be subject to
proration, because the number of such securities requested by tendering holders
of Common Shares exceeds the respective amounts of such securities available for
issuance pursuant to the Offer.

Proration Factors

     Based on the tender numbers reported by the Depositary, the total number of
Common Shares tendered for Northrop preferred stock was approximately
24,962,376, which substantially exceeds the maximum preferred stock
consideration available in the Offer.  As a result, all tenders of Common Shares
for Northrop preferred stock are subject to a proration factor of 0.175269414.
Based on the tender numbers reported by the Depositary, the total number of
Common Shares tendered for Northrop common stock, together with the total number
of Common Shares tendered for Northrop common stock that could not be satisfied
due to pro ration, was approximately 16,352,503. Of such number, 11,237,071
shares were subject to Alternative A elections and 5,115,432 shares were subject
to Alternative B elections. As a result of these amounts, the Common Shares
tendered for Northrop common stock with an Alternative A election are subject to
a proration factor of 0.790733996. There will be no proration of (a) Common
Shares tendered (or deemed tendered as a result of proration) for Northrop
common stock with an Alternative B election, (b) Common Shares tendered for cash
or (c) Preferred Shares tendered for cash.

Average Closing Prices of Northrop Grumman Corporation Common Stock

     The average of the closing prices for Northrop Grumman Corporation common
stock on the NYSE for the five consecutive trading days ending on the second
full trading day before the expiration of the Offer was $86.42.  As described in
the Offer to Purchase or Exchange filed as a part of Northrop's Registration
Statement on Form S-4 dated February 1, 2001 and subsequently amended (the
"Prospectus"), this number is used in determining both the amounts payable to
tendering holders of Common Shares in lieu of fractional shares of Northrop
common stock, and to determine the common stock exchange ratio for the Offer.
Accordingly, all references in the Prospectus to the average of the closing
prices for Northrop Grumman Corporation common stock on the NYSE for the five
consecutive trading days ending on the second full trading day before the
expiration of the Offer should be read to refer to $86.42.

     As described in the section of the Prospectus entitled "The Offer - Cash
Instead of Fractional Shares of NNG Stock," each tendering holder of Common
Shares that would otherwise receive a fractional share of Northrop common stock
will instead be paid cash in an amount equal to the fraction of the share of
Northrop common stock (expressed as a decimal and rounded to the nearest 0.01 of
a share) multiplied by $86.42.

     As described throughout the Prospectus, the number of shares of Northrop
common stock issuable in exchange for Common Shares is determined by dividing
$80.25 by the average of the closing prices for Northrop Grumman Corporation
common stock on the New York Stock Exchange for the five consecutive trading
days ending on the second full trading day before the expiration of the Offer
(i.e. $86.42). Therefore, each Common Share exchanged for Northrop common stock
pursuant to the Offer will be exchanged for 0.9286 shares of Northrop common
stock.

Item 12. Exhibits

     Item 12 of the Schedule TO is hereby amended and supplemented to include
the following exhibits:

     (a)(5)(xv)   Press release issued by Systems on March 23, 2001.

     (a)(5)(xvi)  Press release issued by Systems on March 23, 2001.

     (a)(5)(xvii) Press release issued by Systems on March 30, 2001.

     (a)(5)(xviii)Press release issued by Northrop on April 3, 2001.

     (a)(5)(xix)  Press release issued by Northrop on April 3, 2001.

     (a)(5)(xx)   Press release issued by Northrop on April 4, 2001.

     (a)(5)(xxi)  Press release issued by Northrop on April 9, 2001.

     (a)(5)(xxii) Press release issued by Northrop on April 18, 2001.

                                       3


                                   SIGNATURE

     After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.


                              LII ACQUISITION CORP.


                              By:  /s/ John H. Mullan
                                 -------------------------------------------
                              Name: John H. Mullan
                                   -----------------------------------------
                              Title: Secretary
                                    ----------------------------------------


                              NORTHROP GRUMMAN SYSTEMS CORPORATION
                              (formerly Northrop Grumman Corporation)

                              By:  /s/ John H. Mullan
                                 ------------------------------------------
                              Name: John H. Mullan
                                   ----------------------------------------
                              Title: Corporate Vice President and Secretary
                                    ---------------------------------------


                              NORTHROP GRUMMAN CORPORATION
                              (formerly NNG, Inc.)

                              By:  /s/ John H. Mullan
                                 -------------------------------------------
                              Name: John H. Mullan
                                   -----------------------------------------
                              Title: Corporate Vice President, Associate
                                     General Counsel and Secretary
                                    ----------------------------------------


Dated: April 18, 2001

                                       4


                                 EXHIBIT INDEX



(a)(1)(i)*    Offer to Purchase, dated January 5, 2001.

(a)(1)(ii)*   Letter of Transmittal, Common Stock and Preferred Stock, each
              dated January 5, 2001.

(a)(1)(iii)*  Notice of Guaranteed Delivery, Common Stock and Preferred Stock,
              each dated January 5, 2001.

(a)(1)(iv)*   Notice to Participants in the Litton Industries Employees Stock
              Purchase Plan prior to December 1, 1993, dated January 5, 2001.

(a)(1)(v)*    Notice to Participants in the Litton Industries Employees Stock
              Purchase Plan after November 1, 1994, dated January 5, 2001.

(a)(1)(vi)*   Letter of Transmittal, Common Stock and Preferred Stock, each
              dated February 1, 2001.

(a)(1)(vii)*  Notice of Guaranteed Delivery, Common Stock and Preferred Stock,
              each dated February 1, 2001.

(a)(1)(viii)* Notice to Participants in the Litton Industries Employees Stock
              Purchase Plan prior to December 1, 1993, dated February 1, 2001.

(a)(1)(ix)*   Notice to Participants in the Litton Industries Employees Stock
              Purchase Plan after November 1, 1994, dated February 1, 2001.

(a)(1)(x)*    Letter to Brokers, Dealers, Commercial Banks, Trust Companies and
              other Nominees, Common Stock and Preferred Stock, dated February
              1, 2001.

(a)(1)(xi)*   Letter to Clients, Common Stock and Preferred Stock, each dated
              February 1, 2001.

(a)(1)(xii)*  Guidelines for Certification of Taxpayer Identification
              Number on Substitute Form W-9.

(a)(2)        None.

(a)(3)        Not applicable.

(a)(4)*       Registration Statement on Form S-4 filed with the SEC by NNG, Inc.
              on February 1, 2001 and incorporated by this reference.

(a)(5)(i)*    Letter to Brokers, Dealers, Commercial Banks, Trust Companies and
              other Nominees, Common Stock and Preferred Stock, dated January 5,
              2001.

(a)(5)(ii)*   Letter to Clients, Common Stock and Preferred Stock, each dated
              January 5, 2001.

(a)(5)(iii)*  Guidelines for Certification of Taxpayer Identification Number on
              Substitute Form W-9.

(a)(5)(iv)*   Press release issued by Parent on December 21, 2000 (incorporated
              by reference to Schedule TO-C filed with the Securities and
              Exchange Commission on December 20, 2000).

(a)(5)(v)*    Summary Advertisement as published in the Wall Street Journal on
              January 5, 2001.

(a)(5)(vi)*   Press release issued by Parent on January 8, 2001.

(a)(5)(vii)*  Press release issued by Parent on January 16, 2001.

(a)(5)(viii)* Joint Press release issued by Parent and the Company on
              January 24, 2001.

(a)(5)(ix)*   Summary Advertisement as published in the Wall Street Journal
              on February 1, 2001.

(a)(5)(x)*    Press release issued by Parent on February 22, 2001.

(a)(5)(xi)*   Press release issued by Parent on February 27, 2001.

(a)(5)(xii)*  Press release issued by Parent on March 1, 2001.

(a)(5)(xii)*  Press release issued by Parent on March 9, 2001.

(a)(5)(xiv)*  Press release issued by Parent on March 16, 2001.

(a)(5)(xv)    Press release issued by Systems on March 23, 2001.

(a)(5)(xvi)   Press release issued by Systems on March 23, 2001.

(a)(5)(xvii)  Press release issued by Systems on March 30, 2001

(a)(5)(xviii) Press release issued by Northrop on April 3, 2001.

(a)(5)(xix)   Press release issued by Northrop on April 3, 2001.

(a)(5)(xx)    Press release issued by Northrop on April 4, 2001.

(a)(5)(xxi)   Press release issued by Northrop on April 9, 2001.

(a)(5)(xxii)  Press release issued by Northrop on April 18, 2001.

(b)(i)*       Financing Commitment Letter dated December 20, 2000 from Credit
              Suisse First Boston and The Chase Manhattan Bank relating to
              $6,000,000,000 aggregate principal amount of senior credit
              facilities.

(b)(ii)*      $6,000,000,000 Senior Credit Facilities Commitment Letter dated
              January 30, 2001 from Credit Suisse First Boston, The Chase
              Manhattan Bank and JP Morgan.

(b)(iii)      Form of $2,500,000,000 364-day Revolving Credit Facility among
              NNG, Inc., Parent, Litton Industries, Inc., the Lenders party
              thereto, The Chase Manhattan Bank and Credit Suisse First Boston,
              as Co-Administrative Agents, Salomon Smith Barney, Inc., as
              Syndication Agent, and the Bank of Nova Scotia and Deutsche Banc
              Alex.Brown Inc. as Co-Documentation Agents (incorporated by
              reference to Exhibit 10.6 to Amendment No. 2 to Registration
              Statement on Form S-4 (Commission File No. 333-54800) filed by
              NNG, Inc. on March 27, 2001).

(b)(iv)       Form of $2,500,000 Five Year Credit Agreement among NNG, Inc.,
              Parent, Litton Industries, Inc., the Lenders party thereto, The
              Chase Manhattan Bank and Credit Suisse First Boston, as Co-
              Administrative Agents, Salomon Smith Barney, Inc., as Syndication
              Agent, and The Bank of Nova Scotia and Deutsche Banc Alex.Brown
              Inc. as Co-Documentation Agents (incorporated by reference to
              Exhibit 10.7 to Amendment No. 2 to Registration Statement on Form
              S-4 (Commission File No. 333-54800) filed by NNG, Inc. on March
              27, 2001).

(c)           Not applicable.

(d)(1)*       Merger Agreement, dated as of December 21, 2000, by and among
              Parent, Purchaser and the Company.

(d)(2)*       Confidentiality Agreement dated June 23, 2000, between Parent and
              the Company.

(d)(3)*       Letter Agreement dated December 21, 2000, between Ronald D. Sugar
              and Parent.

(d)(4)*       Amended and Restated Agreement and Plan of Merger dated as of
              January 23, 2001 among Northrop Grumman Corporation, Litton
              Industries, Inc., NNG, Inc. and LII Acquisition Corp.

(d)(5)*       Stockholder's Agreement dated as of January 23, 2001 among
              Northrop Grumman Corporation, NNG, Inc. and Unitrin, Inc.

(d)(6)*       Registration Rights Agreement dated as of January 23, 2001 by and
              among Northrop Grumman Corporation, NNG, Inc. and Unitrin, Inc.

(e)           Not applicable.

(f)*          Section 262 of the Delaware General Corporation Law (included as
              Schedule II to the Offer to Purchase).

(g)           None.

(h)           None.

*  Previously filed.

                                       5


                                                              Exhibit (a)(5)(xv)

                                                              Contact:  Jim Taft
                                                                  (310) 201-3335
For Immediate Release

NORTHROP GRUMMAN EXTENDS
- ------------------------
TENDER OFFER FOR LITTON INDUSTRIES INC.
- ---------------------------------------

     LOS ANGELES -- March 23, 2001 -- Northrop Grumman Corporation (NYSE: NOC)
announced today that it has extended its pending tender offer for the common and
preferred stock of Litton Industries Inc. (NYSE: LIT) from March 22, 2001, to
March 29, 2001, at midnight E.S.T.

     The existing tender offer for all outstanding Litton stock, as previously
announced, will be extended in increments of five business days or less until
the Hart-Scott-Rodino and European Union waiting periods have expired as
provided in Northrop Grumman's agreement with Litton.

     At the close of business on March 22, 2001, approximately 49,198,296 shares
of Litton Industries common and Series B preferred stock had been validly
tendered and not withdrawn.  Of that total, 11,369,204 shares were subject to
guaranteed delivery.  According to Litton, there were 51,292,796 shares
outstanding and reserved for issuance under its employee stock option,
restricted stock or deferred stock plans as of Nov. 30, 2000.

                                    -more-



                                                                          Page 2

NORTHROP GRUMMAN EXTENDS
- ------------------------
TENDER OFFER FOR LITTON INDUSTRIES INC.
- ---------------------------------------

     Northrop Grumman Corporation, headquartered in Los Angeles, is a world-
class, high technology company providing innovative solutions in systems
integration, defense electronics and information technology for its U.S. and
international military, government and commercial customers, as a prime
contractor, principal subcontractor, team member or preferred supplier.  The
company had revenues of $7.6 billion in 2000 and has a workforce of
approximately 39,000 employees.

NNG, Inc., a wholly-owned subsidiary of Northrop Grumman Corporation, has filed
a Registration Statement on Form S-4 with the Securities and Exchange Commission
(the "SEC") in connection with its offer to purchase or exchange all of the
outstanding capital stock of Litton Industries, Inc.  Litton stockholders should
read such Registration Statement and any other relevant documents filed with the
SEC carefully before making any decisions with respect to the offer to purchase
or exchange because these documents contain important information.  Copies of
the Registration Statement and any related documents filed with the SEC can be
obtained free of charge at the website maintained by the SEC at www.sec.gov.

                                   #   #   #
                                                                         0301-52



                                                             EXHIBIT (a)(5)(xvi)

                                              Contact: Jim Taft
                                                     (310) 201-3335
For Immediate Release

EUROPEAN COMMISSION APPROVES NORTHROP GRUMMAN
- ---------------------------------------------
ACQUISITION OF LITTON INDUSTRIES INC.
- -------------------------------- ----

     LOS ANGELES -- March 23, 2001 -- Northrop Grumman Corporation
(NYSE: NOC) announced today that the European Commission has approved the
company's pending acquisition of Litton Industries Inc. (NYSE: LIT).

     On February 22, the company had provided the Commission with the necessary
filings related to the Litton transaction.  Northrop Grumman also said it
remains optimistic that the Hart-Scott-Rodino review will conclude within the
current review period, which expires at midnight E.S.T. on March 29, 2001.

     Northrop Grumman Corporation, headquartered in Los Angeles, is a world-
class, high technology company providing innovative solutions in systems
integration, defense electronics and information technology for its U.S. and
international military, government and commercial customers, as a prime
contractor, principal subcontractor, team member or preferred supplier.  The
company had revenues of $7.6 billion in 2000 and has a workforce of
approximately 39,000 employees.
                                   #   #   #
                                                                         0301-53


NNG, Inc., a wholly-owned subsidiary of Northrop Grumman Corporation, has filed
a Registration Statement on Form S-4 with the Securities and Exchange Commission
(the "SEC") in connection with its offer to purchase or exchange all of the
outstanding capital stock of Litton Industries, Inc. Litton stockholders should
read such Registration Statement and any other relevant documents filed with the
SEC carefully before making any decisions with respect to the offer to purchase
or exchange because these documents contain important information. Copies of the
Registration Statement and any related documents filed with the SEC can be
obtained free of charge at the website maintained by the SEC at www.sec.gov.



                                                            Exhibit (a)(5)(xvii)


NEWS
[LETTERHEAD OF NORTHROP GRUMMAN]

For Immediate Release

NORTHROP GRUMMAN CLEARS HART-SCOTT-RODINO
- ------------------------------------------
FOR PROPOSED ACQUISITION OF LITTON INDUSTRIES INC.;
- ---------------------------------------------------
SETS COMPLETION DATE FOR TENDER OFFER
- -------------------------------------

     LOS ANGELES -- March 30, 2001 -- Northrop Grumman Corporation (NYSE: NOC)
announced today that it received early termination notice yesterday from the
Federal Trade Commission under the Hart-Scott-Rodino Act for its proposed
acquisition of Litton Industries Inc. (NYSE: LIT).

     Previously, the European Commission approved the acquisition on
March 23, 2001.  The Registration Statement on Form S-4 as last amended on
March 27, 2001, has been declared effective by the Securities and Exchange
Commission.  As a result, all U.S. and international governmental and regulatory
reviews that are required for the completion of the offer to purchase all
outstanding common and preferred stock of Litton have been received.

     Northrop Grumman also said it has extended its pending tender offer for
Litton's common and Series B preferred stock to April 2, 2001, at midnight
E.D.T., at which time the tender offer is expected to close.

                                    -more-




                                                                          Page 2

NORTHROP GRUMMAN CLEARS HART-SCOTT-RODINO
- ------------------------------------------
FOR PROPOSED ACQUISITION OF LITTON INDUSTRIES INC.;
- ---------------------------------------------------
SETS COMPLETION DATE FOR TENDER OFFER
- -------------------------------------



  The company announced that the exchange ratio in the pending tender offer for
the common stock of Litton has been fixed at 0.9286 shares of NNG Inc. common
stock for each share of Litton common stock validly tendered by the expiration
of the offer.  NNG Inc. is a wholly-owned subsidiary of Northrop Grumman.  The
company also stated that the conversion price for the new NNG Inc. Series B
preferred will be $109.75 per share provided shareholders approve the conversion
feature.

  The exchange ratio was determined by dividing $80.25 by $86.42, the average of
the closing prices for Northrop Grumman common stock as reported on the New York
Stock Exchange during the five trading days ending March 29, 2001.  The
conversion price for the NNG Inc. Series B preferred stock is equal to 127
percent of $86.42.

  As of the close of business on March 29, the company was advised that
approximately 48,570,000 shares of Litton common stock and Series B preferred
stock had been validly tendered and not withdrawn.  Of that total, approximately
11,320,000 shares were subject to guaranteed delivery.

     Requests for assistance or for copies of the exchange offer materials
should be directed to the information agent for the offer, Georgeson Shareholder
Communications Inc., at (212) 440-9915 or toll-free at (800) 223-2064.

  Northrop Grumman Corporation, headquartered in Los Angeles, is a world-class,
high technology company providing innovative solutions in systems integration,
defense electronics and information technology for its U.S. and international
military, government

                                    -more-




                                                                          Page 3

NORTHROP GRUMMAN CLEARS HART-SCOTT-RODINO
- ------------------------------------------
FOR PROPOSED ACQUISITION OF LITTON INDUSTRIES INC.;
- ---------------------------------------------------
SETS COMPLETION DATE FOR TENDER OFFER
- -------------------------------------


and commercial customers, as a prime contractor, principal subcontractor, team
member or preferred supplier.  The company had revenues of $7.6 billion in 2000
and has a workforce of approximately 39,000 employees.

                                   #   #   #
                                                                         0301-54

     The Registration Statement on Form S-4, as last amended on March 27, 2001,
filed by NNG, Inc. in connection with its offer to purchase or exchange all of
the outstanding capital stock of Litton Industries, Inc was declared effective
by the Securities and Exchange Commission (the "SEC") on March 28, 2001.
Accordingly, the condition to the offer that the Registration Statement be
declared effective has been satisfied.  Litton stockholders should read such
Registration Statement and any other relevant documents filed with the SEC
carefully before making any decisions with respect to the offer to purchase or
exchange because these documents contain important information.  Copies of the
Registration Statement and any related documents filed with the SEC can be
obtained free of charge at the website maintained by the SEC at www.sec.gov.
                                                                -----------






Members of the news media may receive our releases via e-mail by registering at:
http://www.northgrum.com/cgi-bin/registform.cgi
- ------------------------------------------------

LEARN MORE ABOUT US:  Northrop Grumman news releases, product information,
photos and video clips are available on the Internet at:
http://www.northgrum.com


                                    -more-



                                                            Exhibit(a)(5)(xviii)

                 [LETTERHEAD OF NORTHROP GRUMMAN CORPORATION]

NEWS
Northrop Grumman
                                                              Contact:  Jim Taft
                                                                  (310) 201-3335
For Immediate Release

NORTHROP GRUMMAN COMPLETES
- --------------------------
TENDER OFFER FOR LITTON INDUSTRIES INC.
- ---------------------------------------

Acquisition Creates $15 Billion Top-Tier Global Defense Enterprise

     LOS ANGELES -- April 3, 2001 -- Northrop Grumman Corporation (NYSE: NOC)
announced today that it has completed the purchase of all tendered shares of
Litton Industries Inc. common and Series B preferred stock, after receiving all
required U.S. and international governmental and regulatory approvals.

     "Today marks an exciting new chapter in Northrop Grumman's 60-year
history," said Kent Kresa, Northrop Grumman's chairman, president and chief
executive officer.  "The Litton acquisition creates a $15 billion, top-tier
global defense enterprise with 80,000 employees worldwide.  Without question,
the global military environment has changed.  So, too, has Northrop Grumman,"
Mr. Kresa added.  "With Litton, we have solidified our position in major growth
segments of the 21st century defense marketplace."

     Mr. Kresa said Litton is a superb strategic fit that offers tremendous
synergies with existing Northrop Grumman businesses.  "Together, we form an
extraordinary team of men and women who share a proud history of achievement and
the promise of future accomplishments," he noted.

     "Litton elevates Northrop Grumman to a defense electronics powerhouse and
one of the largest providers of information technology for the federal
government," Mr. Kresa said.  "It also gives us the new prime capability of
shipbuilding, making us the largest supplier of non-nuclear surface ships for
the U.S. Navy.  Litton also adds world-class capabilities in the commercial
electronics arena."

                                    -more-



                                                                          Page 2
NORTHROP GRUMMAN COMPLETES
- --------------------------
TENDER OFFER FOR LITTON INDUSTRIES INC.
- ---------------------------------------

     Northrop Grumman said with continued strong growth from existing businesses
and the Litton acquisition, the company's revenues are expected to double to $15
billion in 2001 and to $18 billion in 2003.  The company also expects double-
digit increases in its economic earnings (excluding pension income, amortization
of goodwill and other purchased intangibles) through 2003.

     Mr. Kresa said he was particularly pleased that Northrop Grumman closed the
transaction a few days after the end of the first quarter, meeting the goal set
when the acquisition was announced on Dec. 21, 2000.  The integration of
Litton's businesses into Northrop Grumman will begin immediately and should be
completed by the end of this year.

     The company received early termination notice for the acquisition on March
30, 2001, from the Federal Trade Commission under the Hart-Scott-Rodino Act.
Previously, the European Commission approved the transaction on March 23, 2001.
The tender offer for Litton's common and preferred stock expired April 2, 2001,
at midnight E.D.T.

     To welcome Litton employees to Northrop Grumman, Mr. Kresa is touring
Litton's facilities, beginning today in Pascagoula, Miss., home of the Ingalls
shipyard.  On the trip, he will also visit the Avondale shipyard in New Orleans,
La.; meet with employees of PRC and TASC in the Washington, D.C., area; address
employees of Interconnect Technologies in Springfield, Mo.; and welcome
employees of three defense electronics divisions based in the Los Angeles area.

     Under a definitive agreement signed by the two companies, the value of the
Litton acquisition is approximately $5.1 billion, which includes the assumption
of Litton's $1.3 billion in net debt.

     Northrop Grumman has been advised by the depository, Equiserve Trust Co.,
NA, that as of midnight E.D.T. on April 2, 2001, in excess of 90 percent of the
outstanding shares of Litton Industries common stock and in excess of 50 percent
of the shares of Series B preferred stock had been validly tendered, including
tender by guarantees of delivery.

     The company said it will move promptly to complete the acquisition of the
remaining shares of Litton's common stock pursuant to the merger agreement
signed Jan. 23, 2001.

                                    -more-



                                                                          Page 3
NORTHROP GRUMMAN COMPLETES
- --------------------------
TENDER OFFER FOR LITTON INDUSTRIES INC.
- ---------------------------------------

Following the acquisition, those shares of Litton not tendered under the tender
offer will be converted into the right to receive $80 per share in cash.
Litton's Series B preferred shares will not be affected in the merger.

     Northrop Grumman Corporation is a $15 billion, global aerospace and defense
company with its worldwide headquarters in Los Angeles.  Northrop Grumman
provides technologically advanced, innovative products, services and solutions
in defense and commercial electronics, systems integration, information
technology and non-nuclear shipbuilding and systems.  With 80,000 employees and
operations in 44 states and 25 countries, Northrop Grumman serves U.S. and
international military, government and commercial customers.

Note:  Certain statements and assumptions in this release contain or are based
on "forward-looking" information  and involve risks and uncertainties.  Such
"forward-looking" information includes the statements above as to the impact of
the Litton acquisition on revenues and earnings.  Such statements are subject to
numerous assumptions and uncertainties, many of which are outside the company's
control.  These include the company's ability to successfully integrate the
operations of Litton, assumptions with respect to future revenues, expected
program performance and cash flows, the outcome of contingencies including
litigation, environmental remediation, divestitures of businesses, and
anticipated costs of capital investments.  The company's operations are subject
to various additional risks and uncertainties resulting from its position as a
supplier, either directly or as subcontractor or team member, to the U.S.
Government and its agencies as well as to foreign governments and agencies;
actual outcomes are dependent upon factors, including, without limitation, the
company's successful performance of internal plans; government customers'
budgetary restraints; customer changes in short-range and long-range plans;
domestic and international competition in both the defense and commercial areas;
product performance; continued development and acceptance of new products;
performance issues with key suppliers and subcontractors; government import and
export policies; acquisition or termination of government contracts; the outcome
of political and legal processes; legal, financial, and governmental risks
related to international transactions and global needs for military aircraft,
military and civilian electronic systems and support and information technology;
as well as other economic, political and technological risks and uncertainties
and other risk factors set out in the company's filings from time to time with
the Securities and Exchange Commission, including, without limitation, the
company's reports on Form 10-K and Form 10-Q.

                              #   #   #
                                                                         0401-55

Members of the news media may receive our releases via e-mail by registering at:
http://www.northgrum.com/cgi-bin/regist form.cgi
- ------------------------------------------------

LEARN MORE ABOUT US:  Northrop Grumman news releases, product information,
photos and video clips are available on the Internet at:
http://www.northgrum.com

Northrop Grumman Corporation (formerly NNG, Inc.) has filed a Registration
Statement on Form S-4 with the Securities and Exchange Commission (the "SEC") in
connection with its offer to purchase or exchange all of the outstanding capital
stock of Litton Industries, Inc. Litton stockholders should read such
Registration Statement and any other relevant documents filed with the SEC
carefully before making any decisions with respect to the offer to purchase or
exchange because these documents contain important information. Copies of the
Registration Statement and any related documents filed with the SEC can be
obtained free of charge at the website maintained by the SEC at www.sec.gov.





                                                             Exhibit (a)(5)(xix)

                                                              Contact:  Jim Taft
                                                                  (310) 201-3335
For Immediate Release


DR. RONALD D. SUGAR ELECTED
- ---------------------------

TO NORTHROP GRUMMAN BOARD OF DIRECTORS
- --------------------------------------

     LOS ANGELES -- April 3, 2001 -- Northrop Grumman Corporation (NYSE: NOC)
announced today that Dr. Ronald D. Sugar has been elected to its board of
directors, increasing the board to 14 members.

     Dr. Sugar, formerly president and chief operating officer of Litton
Industries Inc., is corporate vice president, president and chief executive
officer of Northrop Grumman's Litton Sector.  He joined the board effective with
the completion of the company's tender offer for Litton Industries Inc.  The
tender offer expired at midnight E.D.T. April 2, 2001.

     Prior to joining Litton, Dr. Sugar was president and chief operating
officer of TRW Aerospace and Information Systems, and a member of the three-man
Chief Executive Office of TRW Inc., a $17 billion global automotive, aerospace
and information systems company.

     In his nearly 20 years with TRW, Dr. Sugar also served as chief financial
officer of the corporation and as executive vice president and general manager
of TRW's global automotive electronics business.  Earlier, he was vice president
of TRW Space Communications Division and played major roles in TRW's advanced
military, scientific, and commercial space and electronics programs.

                                    -more-



                                                                          Page 2


DR. RONALD D. SUGAR ELECTED
- ---------------------------

TO NORTHROP GRUMMAN BOARD OF DIRECTORS
- --------------------------------------

     Dr. Sugar previously held technical and management positions with Hughes
Aircraft Co., Argosystems Inc. and The Aerospace Corporation.

     In 1968, Dr. Sugar graduated summa cum laude in electrical engineering from
the University of California at Los Angeles, where he also received master's
(1969) and doctoral degrees (1971) in the same field.  In 1996, he was honored
by his alma mater as Alumnus of the Year.  He has completed executive education
programs at Stanford University, the Wharton School of the University of
Pennsylvania and Harvard University.

     Dr. Sugar was appointed by the President of the United States to the
National Security Telecommunications Advisory Committee.  He is a trustee of the
National Defense Industrial Association, a member of the board of governors of
the Aerospace Industries Association and a member of the Conference Board
Council of Operating Executives.  He is a trustee of the Cleveland Opera, The
Cleveland Institute of Music and is an active supporter of the United Way and
other community organizations.

     Northrop Grumman Corporation is a $15 billion, global aerospace and defense
company with its worldwide headquarters in Los Angeles.  Northrop Grumman
provides technologically advanced, innovative products, services and solutions
in defense and commercial electronics, systems integration, information
technology and non-nuclear shipbuilding and systems.  With 80,000 employees and
operations in 44 states and 25 countries, Northrop Grumman serves U.S. and
international military, government and commercial customers.

                                   #   #   #

                                                                         0401-56

Members of the news media may receive our releases via e-mail by registering at:
http://www.northgrum.com/cgi-bin/regist form.cgi
- ------------------------------------------------

LEARN MORE ABOUT US:  Northrop Grumman news releases, product information,
photos and video clips are available on the Internet at:
http://www.northgrum.com

Northrop Grumman Corporation (formerly NNG, Inc.) has filed a Registration
Statement on Form S-4 with the Securities and Exchange Commission (the "SEC") in
connection with its offer to purchase or exchange all of the outstanding capital
stock of Litton Industries, Inc. Litton stockholders should read such
Registration Statement and any other relevant documents filed with the SEC
carefully before making any decisions with respect to the offer to purchase or
exchange because these documents contain important information. Copies of the
Registration Statement and any related documents filed with the SEC can be
obtained free of charge at the website maintained by the SEC at www.sec.gov.




                                                              Exhibit (a)(5)(xx)

                    [LETTERHEAD OF NORTHROP GRUMMAN CORP.]

                                                              Contact:  Jim Taft
                                                                  (310) 201-3335

For Immediate Release

NORTHROP GRUMMAN ISSUES STATEMENT
- ---------------------------------
ON TENDER OFFER FOR LITTON INDUSTRIES INC.
- ------------------------------------------

     LOS ANGELES -- April 4, 2001 -- Northrop Grumman Corporation has issued the
following statement concerning its tender offer for Litton Industries Inc.,
which expired at midnight E.D.T. on April 2, 2001:

     "The depository, Equiserve Trust Co., NA, has advised Northrop Grumman that
as of the close of the tender offer, tenders (including guaranteed deliveries)
had been received for a number of shares which exceeds the total number of
Litton common shares outstanding.

     "The most recent information furnished by Litton indicates that less than
46 million shares of Litton common stock are outstanding.  The depository in the
tender offer has indicated that tenders have been received for a total of
51,368,791 shares of Litton common stock, including guaranteed deliveries
totaling 16,425,431 shares. Stockholders tendering by guaranteed delivery must
make delivery of the tendered shares within three NYSE trading days after the
notice of guaranteed delivery is executed.

     "Based on preliminary information, the company believes that tenders have
been received electing in excess of the maximum 13 million shares of common
stock and 3.5

                                    -more-



NORTHROP GRUMMAN ISSUES STATEMENT
- ---------------------------------
ON TENDER OFFER FOR LITTON INDUSTRIES INC.
- ------------------------------------------

million shares of Series B preferred stock of Northrop Grumman.
The company does not expect to be able to determine preliminary proration
factors until the guaranteed deliveries have been completed or determined to be
invalid.  Determination of the final proration factors will not be completed
until all tenders have been checked for accuracy and completeness, a process
which is expected to take the remainder of the week."

     Northrop Grumman Corporation is a $15 billion, global aerospace and defense
company with its worldwide headquarters in Los Angeles.  Northrop Grumman
provides technologically advanced, innovative products, services and solutions
in defense and commercial electronics, systems integration, information
technology and non-nuclear shipbuilding and systems.  With 80,000 employees and
operations in 44 states and 25 countries, Northrop Grumman serves U.S. and
international military, government and commercial customers.


                                   #   #   #
                                                                         0401-57



Members of the news media may receive our releases via e-mail by registering at:
http://www.northgrum.com/cgi-bin/regist form.cgi
- ------------------------------------------------

LEARN MORE ABOUT US:  Northrop Grumman news releases, product information,
photos and video clips are available on the Internet at:
http://www.northgrum.com


Northrop Grumman Corporation (formerly NNG, Inc.) has filed a Registration
Statement on Form S-4 with the Securities and Exchange Commission (the"SEC") in
connection with its offer to purchase or exchange all of the outstanding capital
stock of Litton Industries, Inc. Litton stockholders should read such
Registration Statement and any other relevant documents filed with the SEC
carefully before making any decisions with respect to the offer to purchase or
exchange because these documents contain important information. Copies of the
Registration Statement and any related documents filed with the SEC can be
obtained free of charge at the website maintained by the SEC at www.sec.gov.



                                                             Exhibit (a)(5)(xxi)

                       [LETTERHEAD OF NORTHROP GRUMMAN]



                                  Contact:  Bob Bishop (Media) (310) 201-3335
                                          Gaston Kent (Investors) (310) 201-3423

For Immediate Release


NORTHROP GRUMMAN ISSUES UPDATE
- ------------------------------

ON LITTON INDUSTRIES TENDER OFFER
- ---------------------------------


     LOS ANGELES -- April 9, 2001 -- Northrop Grumman Corporation (NYSE: NOC)
has provided the following updated information concerning its tender offer for
Litton Industries Inc., which expired at midnight E.D.T. on April 2, 2001:

     "The depository, Equiserve Trust Co. Inc., has advised Northrop Grumman
that tenders had been received for 44,660,309 shares of Litton common stock, of
the 45,900,722 shares outstanding as of March 28, 2001.  The depository also
advised Northrop Grumman that 240,632 shares of Litton's Series B preferred
shares had been tendered, of the 410,643 outstanding as of March 28, 2001.  All
figures are current as of the close of the tender offer and the delivery of
guaranteed shares following three trading days ended April 5, 2001.

     "Based on this preliminary information, the company believes that tenders
have been received electing in excess of the maximum 13 million shares of common
stock and 3.5 million shares of Series B preferred stock of Northrop Grumman
which are to be issued in this transaction.  The parties electing to receive
either common or preferred stock, therefore, may be subject to a proration of
shares.



                                                                          Page 2

NORTHROP GRUMMAN ISSUES UPDATE
- ------------------------------

ON LITTON INDUSTRIES TENDER OFFER
- ---------------------------------


     "These preliminary results indicate that those tendering Litton shares for
Northrop Grumman common under Alternative A are subject to a proration factor of
approximately 0.7907 and 1.0 for Alternative B.  Those tendering for Northrop
Grumman preferred will be subject to a proration factor of approximately 0.1753
on the preferred for Alternatives A, B and C.  Those tendering for preferred
Alternative A are subject to an approximate proration factor of 0.7907 for the
Northrop Grumman common portion of the election and 1.0 for preferred
Alternative B.

     "The company stated that it expects to complete the determination of
proration of shares shortly and to issue shares within the next week."

     Northrop Grumman Corporation is a $15 billion, global aerospace and defense
company with its worldwide headquarters in Los Angeles.  Northrop Grumman
provides technologically advanced, innovative products, services and solutions
in defense and commercial electronics, systems integration, information
technology and non-nuclear shipbuilding and systems.  With 80,000 employees and
operations in 44 states and 25 countries, Northrop Grumman serves U.S. and
international military, government and commercial customers.

                                   #   #   #
                                                                         0401-62



Members of the news media may receive our releases via e-mail by registering at:
http://www.northgrum.com/cgi-bin/regist form.cgi
- ------------------------------------------------

LEARN MORE ABOUT US: Northrop Grumman news releases, product information, photos
and video clips are available on the Internet at: http://www.northgrum.com
                                                  ------------------------



                                                            Exhibit (a)(5)(xxii)

N E W S                                       Northrop Grumman Corporation
- -------                                       Public Information
[NORTHROP GRUMMAN LOGO]                       1840 Century Park East
                                              Los Angeles, California 90067-2199


                                Contact:  Bob Bishop (Media) (310) 201-3335
                                          Gaston Kent (Investors) (310) 201-3423

For Immediate Release


NORTHROP GRUMMAN SETS PRORATION FACTORS
- ---------------------------------------
FOR LITTON INDUSTRIES INC., TENDER OFFER
- ----------------------------------------

     LOS ANGELES -- April 18, 2001 -- Northrop Grumman Corporation
(NYSE: NOC) today announced proration factors for its tender offer for Litton
Industries Inc., which expired at midnight E.D.T. on April 2, 2001.

     Based on the tender numbers reported by the depositary, EquiServe Trust
Company, the total number of Litton common shares tendered for Northrop Grumman
preferred stock was 24,962,376, which substantially exceeds the maximum
preferred stock consideration available in the offer.

     As a result, the company said all tenders of Litton common shares for
Northrop Grumman preferred stock are subject to a proration factor of
0.175269414.

     The total number of Litton common shares tendered for Northrop Grumman
common stock, together with the total number of common shares tendered for
Northrop Grumman preferred stock that could not be satisfied due to proration,
was 16,352,503, based on numbers reported by the depositary.  Of that amount,
11,237,071 shares were subject to Alternative A elections and 5,115,432 shares
were subject to Alternative B elections.

                                    - more -


                                                                          Page 2

NORTHROP GRUMMAN SETS PRORATION FACTORS
- ---------------------------------------
FOR LITTON INDUSTRIES INC., TENDER OFFER
- ----------------------------------------

     As a result of these amounts, the common shares tendered for Northrop
Grumman common stock with an Alternative A election are subject to a proration
factor of 0.790733996.  There will be no proration of (a) common shares tendered
(or deemed tendered as a result of proration) for Northrop Grumman common stock
with an Alternative B election or (b) preferred shares tendered for cash.

     EquiServe reported that 44,660,440 common shares and 240,632 preferred
shares of Litton stock were validly tendered and not properly withdrawn.  There
were 45,900,722 common shares and 410,643 preferred shares of Litton stock
outstanding as of March 28, 2001, according to Litton and its transfer agent,
and the number of Litton shares accepted for purchase or exchange by Northrop
Grumman represent approximately 97.3% of such outstanding common shares and
58.6% of such outstanding preferred shares.

     Based on these numbers, Northrop Grumman said it will issue the full
allotment of 13,000,000 shares of its common stock and 3,500,000 shares of its
preferred stock available for issuance pursuant to the offer.  Proration is
necessary because the number of such securities requested by tendering holders
of Litton common shares exceeds the respective amounts of securities available
in the offer.

     Northrop Grumman Corporation is a $15 billion, global aerospace and defense
company with its worldwide headquarters in Los Angeles.  Northrop Grumman
provides technologically advanced, innovative products, services and solutions
in defense and commercial electronics, systems integration, information
technology and non-nuclear shipbuilding and systems.  With 80,000 employees and
operations in 44 states and 25 countries, Northrop Grumman serves U.S. and
international military, government and commercial customers.


                                    - more -


                                                                          Page 3

NORTHROP GRUMMAN SETS PRORATION FACTORS
- ---------------------------------------
FOR LITTON INDUSTRIES INC., TENDER OFFER
- ----------------------------------------

Note:  Certain statements and assumptions in this release contain or are based
on "forward-looking" information and involve risks and uncertainties.  Such
"forward-looking" information includes the statements above as to the impact of
the proposed acquisition on revenues and earnings.  Such statements are subject
to numerous assumptions and uncertainties, many of which are outside the
company's control.  These include the company's ability to successfully
integrate the operations of Litton, assumptions with respect to future revenues,
expected program performance and cash flows, the outcome of contingencies
including litigation, environmental remediation, divestitures of businesses, and
anticipated costs of capital investments.  The company's operations are subject
to various additional risks and uncertainties resulting from its position as a
supplier, either directly or as subcontractor or team member, to the U.S.
Government and its agencies as well as to foreign governments and agencies;
actual outcomes are dependent upon factors, including, without limitation, the
company's successful performance of internal plans; government customers'
budgetary restraints; customer changes in short-range and long-range plans;
domestic and international competition in both the defense and commercial areas;
product performance; continued development and acceptance of new products;
performance issues with key suppliers and subcontractors; government import and
export policies; acquisition or termination of government contracts; the outcome
of political and legal processes; legal, financial, and governmental risks
related to international transactions and global needs for military aircraft,
military and civilian electronic systems and support and information technology;
as well as other economic, political and technological risks and uncertainties
and other risk factors set out in the company's filings from time to time with
the Securities and Exchange Commission, including, without limitation, the
company's reports on Form 10-K and Form 10-Q.

                                   #   #   #
                                                                         0401-66

LEARN MORE ABOUT US:  Northrop Grumman news releases, product information,
photos and video clips are available on the Internet at:
http://www.northropgrumman.com