NASA/DARPA aerospace engineer Gaurav Gopolan worked with drones, robotics, and stealth helicopters, like the one used on the “Osama” raid. He was found dead in D.C. on Sept. 10, 2011. Foul play is suspected. Given the death of the Navy SEALs after the raid, the suspicion is that Gopolan was killed to suppress his knowledge of something or to prevent his communication of that knowledge. Thanks to Roth.