Engineman Fireman Donald L. Harmes (left) lubricates a water purifier membrane while Engineman 2nd Class (SW) Drake C. Smith supervises aboard the guided-missile destroyer USS Winston S. Churchill (DDG 81). Churchill is on a scheduled deployment supporting maritime security operations, theater security cooperation efforts in the U.S. 2nd Fleet area of responsibility. (U.S. Navy photo by Mass Communication Specialist 2nd Class Aaron Chase/Released)