150530-N-ZZ786-077 SOUTH CHINA SEA (May 30, 2015) Engineman 2nd Class Terrance Gallagher, from Seattle, Wash., conducts repairs to the ship’s reverse osmosis water purifier aboard the Arleigh Burke-class guided-missile destroyer USS Mustin (DDG 89). Mustin is on patrol in the U.S. 7th Fleet area of operation in support of security and stability in the Indo-Asia-Pacific region. (U.S. Navy photo by Mass Communication Specialist 3rd Class David Flewellyn/Released)