180302-N-ND254-0016 BANGOR, Wash. (March 2, 2018) The Ohio-class ballistic-missile submarine USS Louisiana (SSBN 743) arrives home at Naval Base Kitsap-Bangor following a routine strategic deterrence mission. Louisiana is one of eight ballistic-missile submarines stationed in the Pacific Northwest providing the survivable leg of the strategic deterrence triad for the United States. (U.S. Navy photo by Mass Communication Specialist Nancy C. diBenedetto/Released)