190731-N-BM428-0002 MEDITERRANEAN SEA (July 31, 2019) Hospital Corpsman 3rd Class Jessica Ferguson, center, gives mass casualty training on the mess decks of the Arleigh Burke-class guided-missile destroyer USS Donald Cook (DDG 75), July 31, 2019. Donald Cook, forward deployed to Rota, Spain, is on its ninth patrol 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 Damon Grosvenor/Released)