[FredZarguna]

It's not really news. I remember reading about the AVRO disk in a book called: Flying Saucers, Serious Business by Frank Edwards in 1968 or 1969. The stability problems with the Air Force prototypes were cited by UFO aficionados as proof that flying saucers really had to have some special sauce from an "advanced technology."

[Dr. Bogus Pachysandra]

Films of the AVRO have been around for years. The thing was so unstable that they had to tether it, and only “fly” a couple feet off the ground. The thing was a complete boondoggle.
Tesla claimed he could build one though, in 1919!
“I am now planning aerial machines devoid of supporters planes, ailerons, propellers and other external attachments, which will be capable of immense speeds.”