U.S. soldier from the 3rd Cavalry Regiment carries a .50 caliber machine gun barrel over his head while...
A U.S. soldier from the 3rd Cavalry Regiment carries a .50 caliber machine gun barrel over his head while preparing for a mission on forward operating base Gamberi in the Laghman province of Afghanistan December 11, 2014. Picture taken December 11, 2014. REUTERS/Lucas Jackson (AFGHANISTAN - Tags: CIVIL UNREST POLITICS MILITARY)