U.S. Army soldiers (L-R) Private First Class Trent Pritchartt, Specialist Ben Purvis, and Sergeant William Mackenzie from the 2nd Battalion, 12th Infantry Regiment of the 4th Brigade Combat Team, 4th Infantry Division fire a 120mm mortar at insurgent positions inside of Combat Outpost Nangalam in the Pech River Valley of Afghanistan's Kunar Province July 1, 2012. REUTERS/Lucas Jackson (AFGHANISTAN - Tags: CIVIL UNREST MILITARY)