ARTA BEACH, DJIBOUTI (July 21, 2015) U.S. Marines off-load mortars from a landing craft, air cushion on Arta Beach. Elements of the 15th Marine Expeditionary Unit came ashore in Djibouti to conduct sustainment training in order to ensure that they are prepared to respond to any tasking during their deployment. The 15th MEU is currently deployed conducting maritime security operations in the 5th and 6th Fleet areas of responsibility. (U.S. Marine Corps photo by Sgt. Steve H. Lopez/Released)