Airmen of the 28th Aircraft Maintenance Squadron are evaluated on their bomb loading speed and technique during the Global Strike Challenge at Ellsworth Air Force Base, S.D., Oct. 1, 2012. Global Strike Challenge is the world's premier competition for bomber crews, intercontinental ballistic missileers and security forces, and includes units from Air Combat Command, Air Force Global Strike Command, Air Force Reserve Command and the Air National Guard. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer/Released)