160511-M-KR317-000 GULF OF ADEN (May 11, 2016) U.S. Marines with the 13th Marine Expeditionary Unit practice room clearing techniques during visit, board, search and seizure (VBSS) training aboard the USS Boxer (LHD 4), May 11, 2016. The 13th MEU is embarked on the Boxer Amphibious Ready Group and is deployed to maintain regional security in the U.S. 5th Fleet area of operations. (U.S. Marine Corps photo by Sgt. Briauna Birl/ RELEASED)