Navy Petty Officer 2nd Class Joshua Lewis sets material condition zebra, one of several conditions that reflect the degree of threat to a ship, on a hatch during a general quarters drill on the aircraft carrier USS Dwight D. Eisenhower in the Arabian Sea, July 19, 2016. Lewis is a personnel specialist. The Eisenhower and its Carrier Strike Group are supporting Operation Inherent Resolve, maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet area of operations. Navy photo by Petty Officer 3rd Class Anderson W. Branch