171103-N-NG136-005 NORFOLK (Nov. 3, 2017) Aviation Ordnanceman 1st Class Emnoel L. Agas, left, administers a vapor odor to Mass Communication Specialist Seaman Roland John during a respirator fit test aboard the aircraft carrier USS George H.W. Bush (CVN 77). The ship is in-port in Norfolk, Virginia, conducting routine maintenance after a seven-month deployment in support of maritime security operations and theater security cooperation efforts in the U.S. 5th and 6th Fleet areas of operations. (U.S. Navy photo by Mass Communication Specialist Seaman Zachary P. Wickline/Released)