radar, and then to an AN/FPS-66A in 1967. In addition to the general radar surveillance, Cross City AFS supported CIM-10 Bomarc antiaircraft missile testing by the 4751st Air Defense Wing (Missile) and 4751st Air Defense Squadron (Missile) at Eglin AFB Auxiliary Field #9 (Hurlburt Field), Florida. In addition to the main facility, Cross City AFS also operated two AN/FPS-14 Gap Filler sites: Perry, Florida (TM-200A): Bridgeboro, Georgia (TM-200B/TM-199B): On 1 April 1966, the Montgomery Air Defense Sector was replaced by the 32d Air Division, which was reactivated at Gunter AFB on that date. In 1968, Air Defense Command was renamed Aerospace Defense Command (ADC), but all existing command relationships for the 691st Radar Squadron and Cross City AFS with the 32nd Air Division remained unchanged. In 1969, one AN/FPS-6 was removed and higher headquarters for the 691st and Cross City AFS shifted to the 20th Air Division at Tyndall AFB. The Air Force inactivated the 691st Radar Squadron on 30 September 1970 and closed the facility. Today what was Cross City Air Force Station is now the Florida Department of Corrections' Cross City Correctional Institution. Access by the general public is not permitted. Many former Air Force buildings are now utilized by the prison while the radar site is still used as part of the Joint Surveillance System (JSS). Post-War Air Force units and assignments Units: 691st Aircraft Control and Warning Squadron, assigned 1 July 1958 Activated 1 March 1958 at Dobbins AFB, Georgia (not equipped or manned) Redesignated 691st Radar Squadron (SAGE), 1 October 1959 Inactivated 30 September 1970 Assignments: 35th Air Division, 1 December 1957 32d Air Division, 15 November 1958 Montgomery Air Defense Sector, 1 November 1959 32d Air Division, 1 April 1966 20th Air Division, 19 November 1969 – 30 September 1970 See also Florida World War II Army Airfields Army Air Force School of Applied Tactics List of USAF Aerospace Defense Command General Surveillance Radar Stations References Cornett, Lloyd H. and Johnson, Mildred W., A Handbook of Aerospace Defense Organization 1946 - 1980, Office of History, Aerospace Defense Center, Peterson AFB, CO (1980). Maurer, Maurer. (ed.), Combat Squadrons of the Air Force Office of Air Force History, Washington, DC, 1969 (reprint 1982) . Maurer, Maurer (ed.), Air Force Combat Units of World War II, Office of Air Force History, Washington, DC, 1961 (reprint 1983) . Ravenstein, Charles A. (1984). Air Force Combat Wings Lineage and