Staff Sgt. Christopher Stell monitors an F-15C Eagle before flight operations during Cope Tiger 13 March 11, 2013, at Korat Royal Thai Air Force Base, Thailand. Cope Tiger is an annual multilateral aerial exercise designed to improve readiness and cooperation between U.S., Thai and Singaporean forces. Stell is a crew chief assigned to the 44th Aircraft Maintenance Unit. (U.S. Air Force photo/2nd Lt. Jake Bailey)