Area 51 the base extends further east. After leaving the restricted area, Groom Lake Road descends eastward to the floor of the Tikaboo Valley, passing the dirt-road entrances to several small ranches, before converging with State Route 375, the "Extraterrestrial Highway", south of Rachel. Area 51 shares a border with the Yucca Flat region of the Nevada Test Site, the location of 739 of the 928 nuclear tests conducted by the United States Department of Energy at NTS. The Yucca Mountain nuclear waste repository is southwest of Groom Lake. Groom Lake is a salt flat in Nevada used for runways of the
Area 51: An Uncensored History of America's Top Secret Military Base Area 51: An Uncensored History of America's Top Secret Military Base Area 51: An Uncensored History of America's Top Secret Military Base is a book by American journalist Annie Jacobsen about the secret United States military base Area 51. The book, based on interviews with scientists and engineers who worked in Area 51, addresses the Roswell UFO incident and dismisses the alien story. Instead, it suggests that Josef Mengele was recruited by the Soviet leader Joseph Stalin to produce "grotesque, child-size aviators" to be remotely piloted and landed in America to cause hysteria in the likeness of Orson Welles' 1938