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The secrecy of Groom Lake was threatened in early 1974 when the astronauts on Skylab disobeyed specific instructions, pointed their camera out the window and took pictures of a facility that did not officially exist. They returned to Earth and their photographs quickly became a headache for NASA, the CIA, and the Deft of Defense.
NASA had an agreement with the US intelligence community that dated from the beginning of the Gemini program. All astronaut photographs of the Earth would first be reviewed by the National Photographic Interpretation Center in Building 213 in the…
