150420-N-AT895-219 WASHINGTON (April 20, 2015) Chief of Naval Operations (CNO) Adm. Jonathan Greenert delivers remarks during the dedication ceremony for Naval Sea Systems Command headquarters, the Humphreys Building, Building 197, at the Washington Navy Yard. The renovated building is named in honor of 19th century American frigate designer Joshua Humphreys, the architect of the original six U.S. Navy frigates, including USS Constitution. (U.S. Navy photo by Mass Communication Specialist 1st Class Nathan Laird/Released)