Marines and sailors from 13th Marine Expeditionary Unit/Boxer Amphibious Ready Group play a game of hacky sack during a Steel Beach picnic aboard the USS Green Bay, April 30, 2011. Steel Beach is a naval tradition which features barbequed food, sports and leisure activities. The 13th Marine Expeditionary Unit is deployed with Boxer Amphibious Ready Group as the USCENTCOM Theater Reserve Force, also providing support for maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet area of responsibility.