U.S. Air Force Senior Airman Ian O’Donnell, 7th Munitions Squadron gold team member, tightens the fastenings on a tail fin of a GBU-31 V1 joint direct attack munition at Dyess Air Force Base, Texas, Jan. 12, 2017. The bomb build competition is held quarterly, and helps Airmen learn leadership, technical knowledge and operational risk management. (U.S. Air Force photo by Airman 1st Class Rebecca Van Syoc)