200313-M-WW557-536 SOUTH CHINA SEA (March 13, 2020) Cpl. Michael Lasko and Cpl. Kpru Htoo, artillery cannoneers with Fox Battery, Battalion Landing Team, 1st Battalion, 5th Marines, 31st Marine Expeditionary Unit (MEU), post security with an M240B medium machine gun during a Defense of The Amphibious Task Force drill aboard the San Antonio-class dock landing ship USS Green Bay (LPD 20). Green Bay, part of the America Expeditionary Strike Group, 31st MEU team, is operating in the U.S. 7th Fleet area of operations to enhance interoperability with allies and partners and serve as a ready response force to defend peace and stability in the Indo-Pacific region. (U.S. Marine Corps photo by Lance Cpl. Kenny Nunez Bigay/Released)