U.S. Army Gen. Martin E. Dempsey, foreground left, the chairman of the Joint Chiefs of Staff, plugs his ears as he and U.S. Navy Machinist's Mate 2nd Class Brandon Collier shoot a water-filled torpedo tube from the torpedo room aboard the ballistic missile submarine USS Maine (SSBN 741) in the waters off Bangor, Wash., Oct. 3, 2012. Dempsey toured the submarine while visiting the Pacific Northwest. (U.S. Navy photo by Chief Mass Communication Specialist Ahron Arendes/Released)