Area 51: From U-2 to Stealth Testing—A Declassified History of Groom Lake
To the point
Area 51 is a secret Nevada test site where the CIA and Lockheed developed and tested aircraft from the 1950s onward, including the U-2 and F-117, with later unmanned and stealth programs kept classified; despite alien theories pushed by Bob Lazar and John Lear, declassified records tie sightings to human-made aircraft and there is no verified breach of core facilities.
