The Horten Ho 229 was a late-World War II prototype flying wing fighter/bomber. It is the first pure flying wing powered by a turbojet, and has been described by some as the first aircraft designed to incorporate stealth technology. Brothers Reimar and Walter Horten built the world's first jet-powered "flying wing" – an aircraft without tail or fuselage.

The Horten Ho 229 was designed to answer Luftwaffe boss Hermann Göring's call for a bomber designs capable of meeting a "3×1000 requirement" – to carry 1,000kg of bombs a distance of 1,000km at a speed of 1,000kmph, and its ceiling 15,000 meters (49,213 ft).

This video show an interview with a preservationist at the Smithsonian Udvar-Hazy National Air and Space Museum who is in the process of restoring the NAZI Horten Ho 229 "flying wing". The aircraft has been the center of conspiracy theories concerning "NAZI flying saucers". I ask the museum official about the controversy. 

The aircraft was seized at the end of World War II in a project called LUSTY a subproject of Project PAPERCLIP (a secret mission to captured advanced German weapons research to keep it out of Soviet hands) and shipped to Wright Field in Dayton, OH for examination. The design mysteriously reappeared as the revolutionary B-2 "Stealth Bomber".