Keywords: Boeing ground-to-air pilotless aircraft -GAPA-1949.jpg en 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 2014-02-01 10 44 33 http //www nationalmuseum af mil/photos/media_search asp q raf page 86 U S Air Force PD-USGov Uploaded with UploadWizard Surface-to-air missiles Missiles of the United States Missile defence |