161215-N-KP948-093 MEDITERRANEAN SEA (Dec. 15, 2016) - Petty Officer 3rd Class Dyamond P. Khammanivong, from Boston, signals to an SH-60B Sea Hawk, attached to USS Nitze (DDG 94), aboard USS Donald Cook (DDG 75), Dec. 15, 2016. 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 and Africa. (U.S. Navy photo by Petty Officer 3rd Class Alyssa Weeks/Released)