An Afghan boy helps post handbills on a nearby compound wall as U.S. Marines with 81mm Mortar Platoon, Weapons Company, 1st Battalion, 5th Marines, Regimental Combat Team 8 and the Afghan National Army conduct a vehicle checkpoint on route 611 in Sangin, Afghanistan, July 16, 2011. U.S. Marines conduct vehicle checkpoints to limit the enemy’s freedom of movement and to prevent trafficking of weapons and explosive material.