160814-N-UG095-011 SULU SEA (Aug. 14, 2016) Marines assigned to 13th Marine Expeditionary Unit (MEU) perform maintenance on the prop rotor hub of an MV-22 Osprey aircraft aboard amphibious assault ship USS Boxer (LHD 4). Boxer, the flagship for the Boxer Amphibious Ready Group, with the embarked 13th MEU, is operating in the U.S. 7th Fleet area of operations in support of security and stability in the Indo-Asia-Pacific region. (U.S. Navy photo by Mass Communication Specialist 3rd Class Michael T. Eckelbecker/Released)