USS James K. Polk (SSBN-645)
USS James K. Polk (SSBN-645), a Benjamin Franklin class fleet ballistic missile submarine, was the second ship of the United States Navy to be named for James K. Polk (1795–1849), the eleventh President of the United States (1845-1849). She was later converted into an attack submarine and redesignated SSN-645.
Read more about USS James K. Polk (SSBN-645): Construction and Commissioning, Service History, Deactivation, Decommissioning, and Disposal, Commemoration