U.S. Navy Boatswain's Mate 3rd Class Craig Drey tends a safety line attached to Fire Controlman 3rd Class Douglas O'Neil, a surface rescue swimmer, during a man overboard drill aboard the guided missile destroyer USS Mason (DDG 87) July 23, 2013, in the Atlantic Ocean. The Mason was deployed as part of the Harry S. Truman Carrier Strike Group in support of maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet and U.S. 6th Fleet areas of responsibility. (U.S. Navy photo by Mass Communication Specialist 2nd Class Rob Aylward/Released)