171004-N-YF227-063 BREMERTON, Wash. (Oct. 4, 2017) Sailors assigned to the aircraft carrier USS John C. Stennis (CVN 74) discharge CO2 bottles for a periodic maintenance check. John C. Stennis is in port training for future operations after completing flight deck certification and conducting carrier qualifications. (U.S. Navy photo by Mass Communication Specialist 3rd Class William Ford/Released)