171116-N-QR145-054 MEDITERRANEAN SEA (Nov. 16, 2017) Fire Controlman 2nd Class Jesus RiveraHernandez, left, observes as Fire Controlman 2nd Class Casey Ross fires blank rounds from a .50-caliber machine gun aboard the Arleigh Burke-class guided-missile destroyer USS Porter (DDG 78) during a visit, board, search, and seizure exercise with naval special warfare operators. Porter, forward-deployed to Rota, Spain, 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)