Empty ammunition cans lie on the ground after 5.56mm ammunition was distributed to recruits firing the M16/A4 service rifle for combat marksmanship training aboard Marine Corps Recruit Depot Parris Island, S.C., Jan. 30, 2013. Recruits are required to complete combat marksmanship training as a graduation requirement. (U.S. Marine Corps photo by Cpl. Aneshea S. Yee/Released)