Machinist’s Mate 3rd Class Duane Hilumeyer, left, from Maui, Hawaii; Machinist’s Mate 3rd Class Kexian Li, center, from San Francisco, and Machinist’s Mate Fireman Jacob Tylisz, closes a valve to maintain accumulator steam pressure on a catapult aboard the Nimitz-class aircraft carrier USS Carl Vinson (CVN 70). Carl Vinson and its embarked air wing, Carrier Air Wing (CVW) 17, are on deployment in the 7th Fleet area of operations supporting security and stability in the Indo-Asia-Pacific region. (U.S. Navy photo by Mass Communication Specialist 2nd Class John Philip Wagner, Jr./Released)