Lockheed D-21 Mach 3 Drone: The CIA’s Cold War Pioneer
Lockheed D-21B reconnaissance drone at the National Museum of the United States Air Force. U.S. Air Force photo. The Lockheed D-21 was a groundbreaking reconnaissance drone developed during the Cold War by Lockheed’s Skunk Works division for the CIA and the U.S. Air Force. Designed for high-speed, high-altitude missions, the D-21 was intended to gather…