I interned at a Lockheed facility (which is now a nice strip mall). The classified things are behind closed doors or in your computers. The labs where you'd w

I interned at a Lockheed facility (which is now a nice strip mall). The classified things are behind closed doors or in your computers. The labs where you'd work on classified equipment were behind coded doors, so they just wouldn't take anybody there. They really checked too. One time I was waiting for my friend to finish something in a non-classified lab that still had the code on the door. I was literally falling asleep for a couple of hours doing nothing so I decided not to charge those hours. A few weeks later my manager invited me into his office to reprimand me for not charging the hours because they audited the doors and knew where I was for how long. I got overtime because they tracked what was going on so well.