Area 51

Area 51 is a remote tract of land in the southwestern portion of Lincoln County in southern Nevada in the western United States. Situated at its center, on the southern shore of a dry lakebed (salt lake), is a large military airfield, one of the most secretive places in the world. The base's primary purpose is to support development and testing of new military aircraft and to analyze foreign aircraft and weapons systems.

The base lies within the United States Air Force's vast Nevada Test and Training Range. Although the facilities at the range are managed by the 99th Air Base Wing at Nellis Air Force Base, the Groom facility appears to be run as an adjunct of the Air Force Flight Test Center (AFFTC) at Edwards Air Force Base in the Mojave Desert, around 160 miles (260 km) from Groom (AFFTC homepage), and as such the base is known as Air Force Flight Test Centre.