150807-N-XX566-020 PACIFIC OCEAN (Aug. 7, 2015) Aviation Boatswain's Mate (Fuel) Airman Drew Lewis, from Long Beach, Calif., and Aviation Boatswain's Mates (Fuel) 3rd Class Carl Johnson, from Copan, Okla., and Charles Iheanacho, from Houston, set pressure levels for fuel stripping tanks aboard the aircraft carrier USS John C. Stennis (CVN 74). The John C. Stennis Carrier Strike Group is undergoing a composite training unit exercise and joint task force exercise, the final step in certifying to deploy. (U.S. Navy photo by Mass Communication Specialist 3rd Class Andre T. Richard/Released)