Stargate SG-1 | 9.09 “Prototype”

The first prototype Bristol 188 landing at Farnborough after giving a public display at the 1962 SBAC Show

XB-51 in flight 

Boeing XB-15 in flight near Mitchell Field, Long Island, New York, circa 1941 in original Kodachrome

Martin XB-51

XB-51

Yak 121 prototype 

Ye-152M