Damage Controlman 2nd Class Brenda Jackson, from Detroit, conducts training as the on-scene leader during a rescue and assistance drill aboard USS Donald Cook (DDG 75) Jan. 5, 2015. Donald Cook, an Arleigh Burke-class guided-missile destroyer, forward-deployed to Rota, Spain, is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 2nd Class Karolina A. Oseguera/Released)