150523-N-RT036-082 WATERS SOUTH OF JAPAN (May 23, 2015) Machinist's Mate 3rd Class Charles Lewis, from Bremerton, Wash., left, trains Machinist's Mate 3rd Class Christopher Melah, from Madison, Wis., to take a sample of oxygen for a daily check in the forward O2N2 plant aboard the Nimitz-class aircraft carrier USS George Washington (CVN 73). George Washington and its embarked air wing, Carrier Air Wing (CVW) 5, are on patrol in the 7th Fleet area of responsibility supporting security and stability in the Indo-Asia-Pacific region. George Washington will conduct a hull-swap with the Nimitz-class aircraft carrier USS Ronald Reagan (CVN 76) later this year after serving seven years as the U.S. Navy's only forward-deployed aircraft carrier in Yokosuka, Japan. (U.S. Navy photo by Mass Communication Specialist Seaman Jessica Gomez/Released