160709-M-KK554-025 MEDITERRANEAN SEA (July 9, 2016) Marines with the 22nd Marine Expeditionary Unit (MEU) and Sailors from the amphibious transport dock ship USS San Antonio (LPD-17) stand guard as the ship passes through the Strait of Gibraltar July 9, 2016. 22nd MEU, deployed with the Wasp Amphibious Ready Group, is conducting naval operations in the U.S. 6th fleet area of operations in support of U.S. national security interests in Europe. (U.S. Marine Corps photo by Sgt. Ryan Young/ Released)