During the Cold War, the US military developed... ...During the Cold War, the US military developed top secret aircraft at the Air Force facilities at Groom Lak... ...anGhosts. http://www.urbanghostsmedia.com/2011/04/ top-secret -technology-demonstrator-aircraft-declassified/
https://www.neatorama.com/2011/05/29/declassified-a-look-at-formerly-top-secret-aircraft/
Declassified: A Look at Formerly Top Secret Aircraft
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