Weapons load crew Airmen assigned to the 28th Aircraft Maintenance Squadron prepare six GBU-54 laser Joint Direct Attack Munitions for loading onto three B-1 bombers during a Combat Hammer exercise at Ellsworth Air Force Base, S.D., May 12, 2012. 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 Zachary Hada/Released)