U.S. Army snipers assigned to Headquarters and Headquarters Troop, 2nd Cavalry Regiment, and Latvian land forces snipers, pull perimeter security during a combined live-fire exercise with the Latvian land forces, part of Operation Atlantic Resolve in Adazi training area, Latvia, March 6, 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)