REWARDS - Nothing
NOTE - This mission can only be started between 22:00 and 6:00 on the in-game clock.
The easiest way into the compound seems to be through the blast doors shown to you before, but you have to unlock them first by accessing the central control tower. There are two warning levels when and if a spotlight sees you; one that makes the spotlights go into tracking mode and the second shuts down the control tower. You only have until around 5:00 on the game clock to break into the control tower and go through the blast doors, so be sure to be quick and stay silent at the same time. You can only take out two spotlights before the alarm is triggered.
Using the radar and the thermal goggles, take out as many guards as you can from the entrance. Then head inside, grabbing the armor, and take out any close guards on your radar with the sniper rifle or AK-47. Head to the southeast corner of the compound and inch your way towards the control tower, after taking out the southeast spotlight. When you step into the red marker, the blast doors will open, but you only have a short time before they will close again. Run to the yellow marker on the radar and hurry through the blast doors.
Once inside, go through the yellow-trimmer door and into a large room with cranes. Use the platform above the room to take out all the guards and personnel. Once they're dead, go into the next large room with red ducts, again gunning down the guards. Go through the door opposite the entrance, then through a side door into a room with a red marker.
Kill the personnel, then step onto the red marker to disable the SAM site (this will help a lot later). Go back to the ground floor in the red duct room and follow the one hallway to stairs leading to Research Section A. Follow the paths to some labs, which you'll then be told to find a keycard to access the locked door. The personnel guy there will give you his keycard, so pick it and the armor up and step into the red marker.
This opens the door to the last area. Enter cautiously and take out the guards as you slowly descend the stairs. At the bottom is a jetpack (wheeeeee), which CJ will strap on automatically when you approach. Use the Jetpack to get out of there and go back to the yellow blip on your radar to drop it off to The Truth, which marks the end of the mission.