A base B-1 bomber touches down at Ellsworth Air Force Base, S.D., May 15, 2012 after completing a successful mission as part of a Combat Hammer exercise over the Utah Test and Training Range. For the first time in history base B-1s employed GBU-54 Laser Joint Direct Attack Munitions against moving targets during the Air Force’s air to ground Weapon System Evaluation Program known as Combat Hammer. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)