190822-N-KL637-0103 PORTSMOUTH, Va. (Aug. 22, 2019) Sailors discharge CO2 bottles aboard the aircraft carrier USS George H.W. Bush (CVN 77). George H.W. Bush is currently in Norfolk Naval Shipyard for its docking planned incremental availability (DPIA). (U.S. Navy photo by Mass Communication Specialist Seaman Stuart A. Posada/Released)