U.S. Army Cpl. Jonathan Norris operates a T9 Dozer to dig a hull-down position for an M1A2 Abrams Tank during Exercise Peace Sentinel at Novo Selo Training Center, Bulgaria, Nov. 23, 2015. Norris is a heavy equipment operator assigned to the 3rd Infantry Division’s 5th Squadron, 7th Cavalry Regiment. U.S. Army photo by Staff Sgt. Steven M. Colvin