684th Radar Squadron

The 684th Radar Squadron was an Air Defense Command unit of the United States Air Force, activated on 1 February 1959. It was stationed at Mount Lemmon Air Force Station, Arizona, where it operated radar systems to provide airspace surveillance and early warning during the Cold War. The squadron's mission was to detect, track, and identify all aircraft within its area of responsibility as part of the continental air defense network. The 684th Radar Squadron was inactivated on 1 August 1968 as advances in technology and changes in defense strategy reduced the need for such radar stations.