**GLOBAL      DEFENSE CORPORATION**

|                                      |                                                                                                                 | Very                truly yours,                              |
|-------------------------------------------|----------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------|
|                                 |                                                                                                            |  FORTRESS                AMERICA ACQUISITION CORPORATION |
|                                 |                                                                                                            |                                                     |    |    |
|                                      |                                                                                                                 | By:                                                           |   |  /s/                Harvey L. Weiss |
|                                      |                                                                                                                 |                                                          |   |
|                                      |                                                                                                                 |                                                          | Name: | Harvey                L. Weiss |
|                                      |                                                                                                                 |                                                          | Title: | Chief                Executive Officer |
|                                      |                                                                                                                 |                                                          |   |
| AGREED                TO AND ACCEPTED BY: |                                                                                                                 |                                                          |   |
|                                      |                                                                                                                 |                                                          |   |
| GLOBAL                DEFENSE CORPORATION |                                                                                                                 |                                                          |   |
|                                      |                                                                                                                 |                                                          |   |
| By:                                       |  /s/                C. Thomas McMillen                                                                          |                                                          |   |   |
|                                      | Name:  C.                Thomas McMillenTitle:    Chairman                of the Board |                                                          |   |   |

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