U.S. Air Force Senior Airman Sam Bassin, 31st Civil Engineer Squadron Explosive Ordnance Disposal journeyman, participates in close-quarters battle training, Sept. 1, 2015 at Aviano Air Base, Italy. The training included classroom instruction and a hands-on portion where the participants learned how to work as a team in a close-quarters battle environment. (U.S. Air Force photo by senior Airman Areca T. Wilson/Released)