170107-N-KP948-107 MEDITERRANEAN SEA (Jan. 7, 2017) Chief Damage Controlman Richard Regulski gives training on chemical, biological, and radiological warfare defense to Sailors aboard USS Donald Cook (DDG 75). The ship is an Arleigh-Burke class guided-missile destroyer 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)