Roy Sincore, Joint Direct Attack Munitions specialist from Eglin, Fla, inspects a GBU-54 tail fin as part of a training exercise for Airmen of the 28th Munitions Squadron at Ellsworth Air Force Base, S.D., April 18, 2012. The GBU-54 is a 500-pound precision-guided weapon that delivers deadly accurate strikes against moving and stationary targets. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)