A sailor with the Navy's Assault Craft Unit 4 guides a Marine with Combat Logistics Battalion 24, 2nd Marine Logistics Group as he loads a Medium Tactical Vehicle Replacement onto a Landing Craft Air Cushion during a Defense Support of Civil Authorities, or DSCA, training exercise, aboard Naval Amphibious Base Little Creek, Va., Aug. 21, 2013. The battalion worked with several units to complete the operation in preparation for humanitarian relief efforts.