Insanely Secret Mountain Facility
The Cheyenne Mountain Complex isn't so secret for those who live in the area, but it was definitely not well-known among other people who live in the states. This facility only allows high-class officials to enter the premises. The classified photo shows a heavily armed guard at the entrance. Obviously, the CIA wasn't too keen on having such a forceful photo out in the open, which is why it wasn't released to the public for so many years.
Pentagon After 9/11
9/11 completely changed the way American's move about in the world. There are thousands of traumatic and horrific photos in circulation, but none taken by government officials. The photos from 9/11 that were declassified consisted of the destruction of the Pentagon. An American Airlines Flight departing from Washington Dulles International Airport en route to Los Angeles crashed into the western face of the Pentagon, which resides in Arlington County, Virginia. There were six crew members and 53 passengers on board.