The Sunday shift
ELMENDORF AIR FORCE BASE, Alaska - Staff Sgt. Temujin Ching, 477th Aircraft Maintenance Squadron, hooks up the aft closed loop liquid cooling system to an F-22A Raptor. Polyalphaolefin (PAO) is the medium used in the liquid cooling system. The 477th AMXS is the first Reserve F-22 squadron in the Air Force. (U.S. Air Force photo/Senior Airman Garrett Hothan)