Area 51 F-117 became operational in 1983, operations at Groom Lake have continued. The base and its associated runway system were expanded, including expansion of housing and support facilities. In 1995, the federal government expanded the exclusionary area around the base to include nearby mountains that had hitherto afforded the only decent overlook of the base, prohibiting access to of land formerly administered by the Bureau of Land Management. On 22 October 2015 a federal judge signed an order giving land that belonged to a Nevada family since the 1870s to the United States Air Force for expanding Area 51. According to
Area 51 of foreign technology aircraft continued and expanded throughout the 1970s and 1980s. Area 51 also hosted another foreign materiel evaluation program called HAVE GLIB. This involved testing Soviet tracking and missile control radar systems. A complex of actual and replica Soviet-type threat systems began to grow around "Slater Lake", a mile northwest of the main base, along with an acquired Soviet "Barlock" search radar placed at Tonopah Air Force Station. They were arranged to simulate a Soviet-style air defense complex. The Air Force began funding improvements to Area 51 in 1977 under project SCORE EVENT. In 1979, the CIA transferred