Staff Sgt. Francisco Villa, 28th Aircraft Maintenance Squadron weapons load crew specialist, secures a GBU-31 Laser Joint Direct Attack Munitions during the Combat Hammer exercise at Ellsworth Air Force Base, S.D., Feb. 14, 2014. In addition to providing valuable training for B-1 aircrews and munitions specialists, the exercise also provided maintainers the opportunity to hone their skills loading munitions. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)