Capt. Efren S. Saenz (third from left), commanding officer of 2nd Medical Battalion, Combat Logistics Regiment 25, 2nd Marine Logistics Group, leads nearly 200 corpsmen on a training and sustainment hike aboard Camp Lejeune, N.C., July 15, 2010. The seven mile evolution, complete with mass casualty training, is typical of the battalion's quarterly sustainment
hikes. U.S. Marine Corps photo by Lance Cpl. Katherine M. Solano |