Postwar, there have been continual abuses of the term UFO which originated in WW2 as U-Foe (Unknown Foe) from the USAAF to describe potential hostile aircraft. A reporter postwar coined the term flying saucer after interviewing Kenneth Arnold and his sightings... but if you look at the pics of the craft flying in formation they are parabolic discs led by a flying wing that both look like WW2 German Horten desings. After Roswell and all the '50s sci-fi movies, there has been this constant fascination with crypto-aliens. Little Gray creatures that are biological drones that are part of an alien disc system, horrible monster-like Reptilians, nice Mormom-esque blonde/blue Venusians or Aryan/Nordic types, and mystery light beings that seem to phase-shift in and out of reality or sub-divide (Phatons). But in reality it was Mussolini that initiated the first UFO fact-finding organization that was Cabinet RS/33 from 1933. A disc crashed in Lombardia in 1934 and eventually after 7 yrs of research up until 1940, the Cabinet RS/33 files and the Lombardia disc were turned over to the Germans which already had their own crashed Freiberg disc since 1936 that had been taken to Schloss Wewelsberg (Himmler's castle) for reveres-engineering which _might_ have yielded some secrets incorporated into the SS Haunebu designs from 1935-45. The German occult societies had already built their first disc craft in 1922 called the JFM which originated from the Vril Gesellschaft and was funded by the Thule Gesellschaft (which originated the Nazi Party). It was a dimensional flight machine that no one seems to know much about. But that was taken apart in 1924 and later held at Messerschmitt's plant at Augsburg before being moved up to Peenemunde late in the war. Other German discs used a combination of sources for exotic propulsion derived from the captured works of Tesla, German quantum physics, German engineering, occult medium visions, and possibly some reverese-engineering. However, there were more than 30 programs that had no central authority and they ranged from mere circular aircraft to circular winged types, to jet turbine powered models, to multi-powerplant, and then on to exotic mercury ion plasma drives and EMG powerplants with mass-reduction systems and gravitic batteries, flown with a celestial navigation system. These craft went from Wright Field to New Mexico to Edwards AFB, and then up to Area 51. Although the postwar USAF denied German disc craft for 50 years, they admitted to them in 1995 and no information has been supplied despite tons of requests. They remain classified until 2020. The USAF uses public fears of aliens to mask black project aircraft derived from German WW2 tech. They are known as SAPs (Special Access Projects) and much technology of WW2 was hidden under special Intel teams operating from P.O.Boxes (no other location or info available). My dad and his Intel contacts specialized in these things. Aliens? No solid proof. Terrestrial craft? Yes, many of them from various nations but almost all originating from the Third Reich. Japan and Italy had a few designs and an occult order in Britain tried to build a disc too. Postwar there are many US designs and prototypes, Canadian prototypes, and even some Soviet testing. That's all I can say...