Navy Petty Officer 2nd Class Greg Lewis, right, shows a Philippine sailor the operating procedures of a hydraulic chipping hammer during an underwater surface-supply dive as part of exercise Balikatan 2017 at Ipil Port in Ormoc City, Philippines, May 12, 2017. Lewis is a construction electrician assigned to Underwater Construction Team 2. Navy photo by Petty Officer 3rd Class Alfred A. Coffield