Corona program (1960–1972)
The US flew its first spy satellites under the secret Corona program, ejecting film canisters that parachuted back to Earth for planes to catch mid-air. The first 12 attempts failed. When it worked, one mission returned more coverage of the Soviet Union than all prior U-2 spy-plane flights combined.
Corona let Washington count Soviet missiles directly and defused fears of a 'missile gap.'
It established space reconnaissance as the backbone of US intelligence, a mission the current constellation reinvents at scale.
Corona created the mission the agency now performs. The shift today is not what it does, but how many satellites it uses and how fast the data moves.
