Air Frame: AF-1, an Air Force F-35A test aircraft, flies the first F-35A test sortie with external weapons, Feb. 16, 2012. The aircraft carried two AIM-9X air-to-air missiles on its outboard wing stations and was also configured with four additional external wing pylons during the flight from Edwards AFB, Calif. (Air Force photo) (Click on image above to reach wallpaper version.)