The 6th Air Refueling Squadron (6 ARS) is part of the 60th Air Mobility Wing at Travis Air Force Base, California. It operates the McDonnell Douglas KC-10 Extender aircraft conducting air refueling missions.The squadron was first active during World War II as the 6th Bombardment Squadron. After the end of the war, the squadron served in the reserves from 1947 until 1949.In 1951, the 6th Air Refueling Squadron was activated for a brief time.