U.S. Marine Cpl. Darek Kelsey, left, a scout sniper from Greensburg Pa., and assigned to 3rd Battalion, 4th Marine Regiment, makes adjustments to his M40A5 sniper rifle at a live fire range on Camp Leatherneck, Helmand Province, Afghanistan, March 23, 2013. Kelsey was were there to calibrate his weapon before conducting combat operations in support of Operation Enduring Freedom.
(U.S. Marine Corps photo by Staff Sgt. Ezekiel R. Kitandwe/Released)