Alternate endings:
In the last mission, When the bomb is disarmed, a number of different endings can play out. To unlock each ending take the following steps below.

Note: The targets listed below are the Crouse Ship, Hisham, and Lambert.

Unlockable: Condition:

Ending A: Good:   
NSA trust above 33%, and you managed to save at least two of the three targets.

Ending B: Normal:   
NSA trust below 33%, but you managed to save the three targets. Or destroy two of the three targets, and NSA trust above 33%.

Ending C: Bad:   
Destroy/Kill all three targets. Or Destroy/Kill two of the targets, and NSA trust below 33%.