Weapons load crew Airmen assigned to the 28th Aircraft Maintenance Squadron load GBU-31 Laser Joint Direct Attack Munitions onto a B-1 bomber during the Combat Hammer exercise at Ellsworth Air Force Base, S.D., Feb. 14, 2014. Aircrews from the 34th Bomb Squadron tested their ability to employ GBU-31s and GBU-54s against moving targets during Combat Hammer, the Air Force’s air to ground Weapons System Evaluation Program exercise. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)