Ancient Aliens: Inside Area 51's UFO Secrets

Area 51 is the common name of a highly classified United States Air Force (USAF) facility within the Nevada Test and Training Range.

A remote detachment administered by Edwards Air Force Base, the facility is officially called Homey Airport (ICAO: KXTA, FAA LID: XTA)[2] or Groom Lake (after the salt flat next to its airfield).

Details of its operations are not made public, but the USAF says that it is an open training range,[3] and it is commonly thought to support the development and testing of experimental aircraft and weapons systems.[4][3] The USAF and CIA acquired the site in 1955, primarily for flight testing the Lockheed U-2 aircraft.[5]