Airman 1st Class Trenton Anderson, 28th Aircraft Maintenance Squadron weapons load crew member, prepares to load the aft weapons bay of a B-1 bomber with a GBU-31 during the Combat Hammer exercise at Ellsworth Air Force Base, S.D., Feb. 14, 2014. The goal of the exercise was to evaluate the effectiveness, maintainability, suitability and accuracy of precision-guided munitions and other advanced air-to-ground weapons. (U.S. Air Force photo by Airman 1st Class Rebecca Imwalle/ Released)