While local children look on, US Marine Corps (USMC) Sergeant (SGT) Demetrius Crawford with the 24th Marine Expeditionary Unit (MEU), from Camp LeJeune, North Carolina, stands perimeter guard duty with his Colt 5.56 mm M16A2 Rifle, around a water treatment plant in the city of Qalat Sikar, in support of Operation IRAQI FREEDOM