A supersonic ground-to-air pilotless aircraft (GAPA) receives its final check prior to launching at Holloman Air Force Base, N.M., c. 1949. The USAF launched more than 100 such Boeing-built test vehicles in research to develop defensive weapons against bomber attacks. (U.S. Air Force photo)
U.S. Air Force
2014-02-01 10:44:33
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