190129-N-UJ486-0096 NORFOLK (Jan. 29, 2019) Rear Adm. Lorin Selby, right, chief engineer and deputy commander for ship design, integration, and naval engineering at Naval Sea Systems Command, presents Capt. Nicholas Dienna, commanding officer of the aircraft carrier USS Harry S. Truman (CVN 75), with the first 3-D printed metal part for installation and use on a U.S. Navy aircraft carrier. The piping assembly, manufactured by Huntington Ingalls Industries, will be installed and evaluated for a one-year period. (U.S. Navy photo by Mass Communication Specialist 3rd Rebekah A. Watkins/Released)