150318-N-EI510-015 EAST CHINA SEA (March. 18, 2015) Marines attached to the 31st Marine Expeditionary Unit (31st MEU) shoot M16 rifles aboard the forward deployed amphibious transport dock ship USS Green Bay (LPD 20). Green Bay is part of the Bonhomme Richard Amphibious Ready Group (ARG) and, along with the embarked 31st Marine Expeditionary Unit (MEU), is currently conducting a certification exercise. (U.S. Navy photo by Mass Communication Specialist 3rd Class Scott Barnes/Released)