Tech. Sgt. Ryan Walker, 28th Aircraft Maintenance Squadron crew chief, inspects a B-1 bomber during the Global Strike Challenge at Ellsworth Air Force Base, S.D., Sept. 26, 2014. More than 450 Airmen took part in this year’s competition, vying for the distinction of the best bomb wing in the Air Force. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)