Armed with a Colt 5.56mm M16A2 Assault Rifle, U.S. Marine Corps Lance Cpl. Chris Peck, a rifleman with Weapons Company, 3rd Battalion, 3rd Marine Regiment, provides security while on a long security halt in the Khowst-Gardez Pass, Afghanistan, on Dec. 29, 2004. These Marines are conducting security and stabilization operations in support of Operation Enduring Freedom. (U.S. Marine Corps Photo by Cpl James L. Yarboro) (Released)