Christopher J. Schayer New Haven, Connecticut   U.S. Army Flight Medic Sgt. Nathaniel Dabney, second left, of Prescott, Ariz., with Charlie Company, 3-82nd Aviation Regiment- Task Force Talon, directs U.S. Marines as they carry a young Afghan gunshot victim to a waiting army Blackhawk helicopter during a medevac operation, in Helmand province, southern Afghanistan, Monday,…