151118-N-TC720-422 MEDITERRANEAN SEA (Nov. 18, 2015) Information Systems Technician Seaman Lawrence Olivarez, from Round Rock, Texas, conducts checks on transceivers aboard USS Donald Cook (DDG 75) Nov. 18, 2015. Donald Cook, an Arleigh Burke-class guided-missile destroyer, forward deployed to Rota, Spain is conducting a routine patrol 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 3rd Class Mat Murch/Released)