170322-N-N0901-002 ROTA, Spain (March 22, 2017) Lt. Christian Seymour, left, teh operations officer aboard the Arleigh Burke-class guided missile destroyer USS Ross (DDG 71) , shows South African sailors from SAS Amatola (F 145) the newly-installed Mark 38 25mm machine gun system during a tour of the ship. Ross, 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 Logistics Specialist 2nd Class Melissa De La Pena/Released)