MARINE CORPS BASE CAMP PENDLETON, Calif. - A Marine attending the Prescout Sniper Course with 1st Marine Division Schools sets up in his firing position during a stalking exercise here, Nov. 20, 2013. The Marines moved silently and cautiously toward a mock objective, using their surroundings as camouflage. The teachers searched for their students and sent them back to the start point when caught. This emphasized the importance of staying low to the ground and out of sight.