U.S. Army Pfc. Vance S. Morris, assigned to Iron Troop,

U.S. Army Pfc. Vance S. Morris, assigned to Iron Troop, 3rd Squadron, 2nd Cavalry Regiment, pulls rear security during a combine situational exercise with the Estonian army, part of Operation Atlantic resolve in Tapa training area, Estonia, March 12, 2015. Operation Atlantic Resolve is a U.S. Army Europe-led land force assurance training mission taking place across Estonia, Latvia, Lithuania and Poland to enhance multinational interoperability, strengthen relationships among allied militaries, contribute to regional stability and demonstrate U.S. commitment to NATO. (U.S. Army photo by Staff Sgt. Pablo N. Piedra / released)