190520-N-VW723-0049 BREMERTON, Wash. (May 20, 2019) Gunner's Mate 2nd Class Breanna Lawson, left, and Aviation Ordanceman 3rd Class Brandon Hamilton replace a control valve aboard the aircraft carrier USS Nimitz (CVN 68). Nimitz is conducting a docking planned incremental availability at Puget Sound Naval Shipyard and Intermediate Maintenance Facility where the ship is receiving scheduled maintenance and upgrades. (U.S. Navy photo by Mass Communication Specialist Seaman Keenan Daniels/Released)