191028-N-ON977-0037 NORFOLK (Oct. 28, 2019) Capt. Brian Hogan, left, commanding officer of Pre-Commissioning Unit (PCU) Delaware (SSN 791), and Rear Adm. James Waters, commander, Submarine Group 2, speak to members of the House of Representatives during a distinguished tour on board Naval Station Norfolk in Norfolk, Va., Oct. 28, 2019. Delaware is the 18th Virginia-class fast-attack submarine and holds a crew of 136 plankowner Sailors. Fast-attack submarines are designed for a broad spectrum of open-ocean and littoral missions. (U.S. Navy photo by Mass Communication Specialist 2nd Class Alfred A. Coffield/Released)