Linda Martin, a tour guide aboard the Battleship Missouri Memorial, sings the national anthem during a re-enlistment ceremony held for service members based in Hawaii on Ford Island, Joint Base Pearl Harbor-Hickam. More than 30 service members took the oath of enlistment on the 13th anniversary of the Sept. 11 attacks, commemorating their past and future service. (U.S. Navy photo by Mass Communication Specialist 2nd Class Diana Quinlan/Released)