My neighbor is a spook aeronautical engineer, I think related to satellites because he built a home-based system to track all U.S. airline flights. A week ago, a clean-cut investigator appeared at our front door and his ID was issued by the United States Personnel Management Dept. He was here to ask us a lot of questions about my neighbor...mostly related to his character and if he traveled for long periods out of the country. When I told my neighbor about it, I told him that I knew it was for a security check and that I told the investigator that he was not a communist, my neighbor laughed!!!
Quite the interesting interview Blake Percival: whistleblower and successful qui tam plaintiff on USIS dumping fraud: https://www.youtube.com/watch?v=FopC1sCa2y8