151224-N-UD469-02 PUGET SOUND, Wash. (Dec. 24, 2015) The Ohio-class ballistic-missile submarine USS Alabama (SSBN 731) prepares to transit the Hood Canal as it returns to its homeport of Naval Base Kitsap-Bangor. Alabama is one of eight ballistic-missile submarines stationed at the base, providing the survivable leg of the strategic deterrence triad for the United States. (U.S. Navy photo by Mass Communication Specialist 2nd Class Amanda R. Gray/Released)