150316-N-XG464-031 GULF OF OMAN - Sailors assigned to the amphibious transport dock ship USS New York participate in a 9mm handgun sustainment course. New York is a part of the Iwo Jima Amphibious Ready Group and, with the embarked 24th Marine Expeditionary Unit, is deployed in support of maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet area of operations.