U.S. Army Spc. John McIntyre digs with an M9 armored combat earthmover to create a hull-down battle position for an M1A2 Abrams tank during Exercise Peace Sentinel at Novo Selo Training Center, Bulgaria, Nov. 23, 2015. McIntyre is a combat engineer assigned to the 3rd Infantry Division’s 5th Squadron, 7th Cavalry Regiment. Peace Sentinel is a joint training exercise that focuses on interoperability between Bulgarian and U.S. forces. U.S. Army photo by Staff Sgt. Steven M. Colvin