170903-N-QR145-102 MEDITERRANEAN SEA (Sept. 3, 2017) Sailors assigned to the Arleigh Burke-class guided-missile destroyer USS Porter (DDG 78) swim in the Mediterranean Sea during an all-hands swim call while underway Sept. 3, 2017. 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)