Tonopah Air Force Base (Tonopah Army Air Field in World War II) is a Formerly Used Defense Site (FUDS) that was a Tonopah Basin military installation until shortly after it was designated an Air Force Base in 1948. Two of the runways still in use are maintained by Nye County, Nevada; and WWII building foundations and 3 hangars of the base remain at the municipal Tonopah Airport.