Airmen assigned to the 28th Aircraft Maintenance Squadron secure guided bomb units to a load trailer during the Global Strike Challenge at Ellsworth Air Force Base, S.D., Sept. 26, 2014. The event pits bomber, intercontinental ballistic missile and security forces teams from across the Air Force community against one another to improve combat capabilities and foster espirt de corps through competition and teamwork. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)