170802-N-UD469-058 PUGET SOUND, Wash. (Aug. 2, 2017) The Ohio-class ballistic-missile submarine USS Pennsylvania (SSBN 735) transits the Hood Canal as the boat returns to its homeport at Naval Base Kitsap-Bangor following a routine strategic deterrent patrol. Pennsylvania is one of eight ballistic-missile submarines stationed at the base, providing the most survivable leg of the strategic deterrence triad for the United States. (U.S. Navy photo by Mass Communication Specialist 1st Class Amanda R. Gray/Released)