21st ADS

The 21st Air Defense Squadron (21st ADS) is a United States Air Force unit responsible for airspace surveillance and defense operations. Originally activated in 1992, the squadron operated out of Keflavik Air Base, Iceland, playing a critical role in monitoring and controlling the North Atlantic airspace during the post-Cold War era. The 21st ADS provided vital radar coverage and command and control support, ensuring the security of NATO's northern flank. The unit was inactivated in 2006 following the closure of the U.S. military presence in Iceland, marking the end of its distinguished mission in the region.