36. -- Several Lockheed GTD-21 ramjet reconnaissance drones, a stealthy type used carried by B-52's, were spotted and photographed by air buffs on a public tour, after a desert wind blew off their shrouds. The Air Force at first allowed photos to be taken, but soon reclassified the program until the 21st Century.

-- During the Viet Nam War, China shot down and displayed a long-winged stealthy version of the Ryan 147.

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