| Transaction Date | Filer | Title | Filing | Transaction Type | Shares Traded | Price | Total Held* |
|---|---|---|---|---|---|---|---|
| Feb 20, 2008 | Pres. & Chf. Operating Officer | Form 4 | Other acquisition or disposition (describe transaction) | 11,760 | $81.00 | 152,123 | |
| Feb 20, 2008 | Corp VP & Pres Technical Servs | Form 4 | Other acquisition or disposition (describe transaction) | 6,468 | $81.00 | 58,732 | |
| Feb 20, 2008 | Corp VP & Pres Integrated Sys. | Form 4 | Other acquisition or disposition (describe transaction) | 2,621 | $81.00 | 34,472 | |
| Feb 20, 2008 | Corporate VP, Controller & CAO | Form 4 | Other acquisition or disposition (describe transaction) | 3,675 | $81.00 | 34,175 | |
| Feb 20, 2008 | Corp.VP, Bus Dev & Gov. Rel. | Form 4 | Other acquisition or disposition (describe transaction) | 5,880 | $81.00 | 84,293 | |
| Feb 20, 2008 | Corp. VP & Pres. Space Tech. | Form 4 | Other acquisition or disposition (describe transaction) | 7,840 | $81.00 | 69,782 | |
| Feb 20, 2008 | Corp. VP & Pres. Info. Tech. | Form 4 | Other acquisition or disposition (describe transaction) | 1,764 | $81.00 | 21,114 | |
| Feb 20, 2008 | Corp. VP, Communications | Form 4 | Other acquisition or disposition (describe transaction) | 3,920 | $81.00 | 57,490 | |
| Feb 20, 2008 | Corporate Vice President | Form 4 | Other acquisition or disposition (describe transaction) | 11,760 | $81.00 | 86,174 | |
| Feb 20, 2008 | Corp. VP & Pres. Shipbuilding | Form 4 | Other acquisition or disposition (describe transaction) | 9,800 | $81.00 | 97,192 |
* Represents the number of non-derivative securities directly held. (I) Indicates that some (or all) of these shares are held indirectly.