========================================================================== A photograph appears to show a plane flying over Edwards Air Force base that's unlike any aircraft publicly acknowledged by the U.S. Air Force. The aircraft appears similar to the RQ-180, a high-altitude spy drone. The RQ-180’s existence has never been confirmed by the U.S. Air Force. ======================================================================== The image (above) depicts a flying wing-shaped aircraft leaving a contrail in its wake. An observer reportedly took the photo while the aircraft was over the Military Operating Area at Edwards Air Force Base in California. According to Aviation Week & Space Technology, the aircraft “was flying in a racetrack pattern...