The Secretive D-21 Drone and Operation Senior Bowl

Even more Top Secret than the Lockheed SR-71, the D-21 drone was a promising Cold War idea that could have eliminated the need for manned overflights, although it was mostly unsuccessful. After the Soviet Union brought down a Lockheed U-2 spy plane on May 1, 1960, and captured the pilot, Francis Gary Powers, the Cold […]

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