The 73d Special Operations Squadron (73 SOS) is a unit of the United States Air Force, assigned to the 27th Special Operations Group at Cannon Air Force Base, New Mexico. The squadron operates AC-130W Stinger II ground-attack aircraft in support of Air Force Special Operations Command.The 73d SOS is one of the oldest in the Air Force, its origins dating to the formation of the 73d Aero Squadron in February 1918.