Area 51: A History of Groom Lake Flight Testing, Secrecy, and Public Curiosity
To the point
Area 51 is a highly classified U.S. military testing facility in Nevada where aircraft such as the U-2, SR-71, and F-117 have been tested, and its secrecy has fueled UFO conspiracy theories even as officials say it conducts advanced flight testing, with photographs by U.S. Air Force photographer William Lewis illustrating its activity.
