180516-O-N0101-211 NEWPORT NEWS, Va. (May 16, 2018) Jacob McNulty welds the initials of ship's sponsor Sally Jewell into the authentication plate of the Virginia-class attack submarine Pre-Commissioning Unit (PCU) Montana (SSN 794). Jewell is a former secretary of the interior. Montana is the 21st Virginia-class attack submarine and is being built by Huntington Ingalls Industries Newport News Shipbuilding in Newport News, Va. (U.S. Navy photo by Matt Hildreth courtesy of HII/Released)