U.S. Marine Corps Lance Cpl. Adam Devalk, top, a motor vehicle operator with the 2nd Platoon, Transportation Support Company, Combat Logistics Battalion 7, coaches Lance Cpl. Shane McCoid, a motor vehicle operator with the unit, as he fires an M2 .50-caliber machine gun from the turret of a mine-resistant, ambush-protected vehicle at a range at Camp Leatherneck, Helmand province, Afghanistan, Feb. 16, 2014.