170125-N-KP948-049 MEDITERRANEAN SEA (Jan. 25, 2017) Damage Controlman 2nd Class Luis Maldonado, assigned to the Arleigh-Burke class guided-missile destroyer USS Donald Cook (DDG 75), gives toxic gas training to Sailors. The ship is forward-deployed to Rota, Spain, conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe and Africa. (U.S. Navy photo by Mass Communication Specialist 3rd Class Alyssa Weeks/Released)