Airman 1st Class James Mellon, 28th Munitions Squadron conventional maintenance member, and Tech. Sgt. Vahn Chant, 28th MUNS conventional maintenance production manager, assembles a GBU-54 laser-guided Joint Direct Attack Munition as part of a training exercise at Ellsworth Air Force Base, S.D., April 18, 2012. Mellon and Chant joined other 28th MUNS technicians to build six GBU-54s to be dropped by 37th Bomb Squadron aircrews as part of a Combat Hammer exercise in May. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)