PHILADELPHIA - Chief of Naval Operations Adm. Lisa Franchetti witnesses the pouring of the aft outer structure of the future Columbia-class ballistic-missile submarine USS Wisconsin (SSBN 827) during a tour of Naval Foundry and Propeller Center (NFPC) in Philadelphia, Feb. 22. Franchetti was able interact with Navy civilians working in the ship and submarine production sector at NFPC. (U.S. Navy photo by Mass Communication Specialist 1st Class William Spears)