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US Air Force general Donald Putt tries out the Avro Canada Avrocar

 

Manmade Saucers

 

disc aircraft before 1947

von Kármán's April 1947 Wright Brothers lecture

zimmer's skimmers

boeing's WWII "flapjacks"

project SIGN's saucer

"flying saucers found in maryland!"

the avro canada saucer projects

ulam's atomic saucer

soviet disc aircraft

the saucer and the harrier

"black aircraft" and ufos

claims about "antigravity" technology