6990th Security Group

The 6990th Security Group was a United States Air Force signals intelligence (SIGINT) unit activated in 1965 at Kadena Air Base, Okinawa. Its primary mission was to provide electronic surveillance and intelligence support during the Vietnam War and throughout the Cold War in the Pacific region. The group operated RC-135 reconnaissance aircraft and other intelligence-gathering platforms, intercepting and analyzing communications from adversaries. The 6990th Security Group remained active until it was inactivated in 1993 as part of post-Cold War restructuring of Air Force intelligence assets.