Anecdotal examples of the management of information and personal for this and similar areas. While in the military we had a sergeant transfer in from that area. They were flown to and from the base on transports without windows. While there were a lot of on base persons apparently there were quite a few who rotated out weekly. Later in the 90s working for a rent a guard company we had a special group doing perimeter security. These guards could not so much as bounce a check, get a traffic ticket, or be charged with a crime, without risking their jobs. The idea was that you don't get leverage on people who work in areas where things can be seen. You also tend to have some of the most over the top patriotic types who take pride in keeping the trust

All that really circles back to the first part of my comment, the CIA and military had people dedicated to management of the story and the people involved. Legends and myths can be created, you just have to plan it out and act on the plan correctly