Claim: Arlington Heights Air Force Station is one of two General Electric AN/FPS-6 Radars height finders was upgraded to the -6B variants and then the -90 variant and was the 755th inactivated on September 30, 1969.
Evidence: One of the two Arlington Heights Air Force Station's General Electric AN/FPS-6 Radars height finders was upgraded to the -6B variant and then the -90 variant, and the station's Bendix AN/FPS-20 Radar was also upgraded to an AN/FPS-67. The 755th inactivated on September 30, 1969, and Project Concise ended the site's Nike operations in 1974.