191221-N-VP266-1027 ATLANTIC OCEAN (Dec. 21, 2019) Marines assigned to the 26th Marine Expeditionary Unit (MEU) conduct a gun reload exercise on the flight deck of the amphibious dock landing ship USS Oak Hill (LSD 51), Dec. 21, 2019. Oak Hill is operating in the Atlantic Ocean in support of naval operations to maintain stability and security in order to ensure access, deter aggression and defend U.S., allied and partner interests. (U.S. Navy photo by Mass Communication Specialist 3rd Class Griffin Kersting/Released)