PACIFIC OCEAN (March 21, 2021) U.S. Marines with Battalion Landing Team 1/1, 11th Marine Expeditionary Unit, provide security during a simulated freedom of navigation operation aboard the amphibious dock landing ship USS Pearl Harbor (LSD 52). U.S. Navy and Marine Corps integration training provides the Essex Amphibious Ready Group/11th MEU its first opportunity to plan, brief, execute multiple mission packages. The Essex ARG is underway conducting routine operations in U.S. Third Fleet. (U.S. Marine Corps photo by Cpl. Jaxson Fryar)