U.S. sailors refuel an F-35C Lightning II carrier-variant joint strike fighter on the flight deck of the aircraft carrier USS Dwight D. Eisenhower in the Atlantic Ocean, Oct. 4, 2015. The F-35C Lightning II Patuxent River Integrated Test Force is currently conducting follow-on sea trials aboard the Eisenhower. The sailors are assigned to Air Test and Evaluation Squadron 23. U.S. Navy photo by Petty Officer 3rd Class Jameson E. Lynch