Photos: Historic D-21
Historic photo of Two D-21 Drones attched to the wings of a B-52 Stratofortress. An Air Force unit known as the 4200th Test Squadron was formed at Beale Air Force Base, Calif., in the late 1960s to operate modified D-21s, which were launched from the wings of B-52s (Courtesy photo)

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Photo by:  |  VIRIN: 130329-F-BB999-061.JPG