170513-M-AS864-022 MEDITERRANEAN SEA (May 13, 2017) Sailors and Marines assigned to the San Antonio-class amphibious transport dock ship USS Mesa Verde (LPD 19) test the functionality of an AH-1 Cobra helicopter as it receives fuel during a routine maintenance check aboard the ship. (U.S. Marine Corps photo by Gunnery Sgt. Adaecus G. Brooks/Released)