171102-N-QR145-086 MEDITERRANEAN SEA (Nov. 2, 2017) U.S. and Tunisian Sailors board the Arleigh Burke-class guided-missile destroyer USS Porter (DDG 78) during a visit, board, search, and seizure training. Porter is forward-deployed to Rota, Spain, and is on its fourth patrol in the U.S. 6th Fleet area of operations in support of regional allies and partners, and U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 3rd Class Krystina Coffey/Released)