https://www.space.com/12996-secret-s...ified-nro.html
CHANTILLY, Va. – Twenty-five years after their top-secret, Cold War-era missions ended, two clandestine American satellite programs were declassified Saturday (Sept. 17) with the unveiling of three of the United States' most closely guarded assets: the KH-7 GAMBIT, the KH-8 GAMBIT 3 and the KH-9 HEXAGON spy satellites.
For me the KH-9 was one of the workhorses I relied upon in support of my intelligence collection missions. The other satellites are still classified.