U.S. Marine Sgt. Steve De Leon gives a class about

U.S. Marine Sgt. Steve De Leon gives a class about observation techniques to Marines with Lima Company, 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit, during the MEU’s realistic urban training exercise aboard Camp Roberts, Calif., Dec. 8, 2014. RUT prepares the 15th MEU Marines for their upcoming deployment, enhancing their combat skills in environments similar to those they may find in future missions. (U.S. Marine Corps photo by Cpl. Elize McKelvey/Released)