190309-N-WK982-2093 PHILIPPINE SEA (March 09, 2019) The Arleigh Burke-class guided-missile destroyer USS Milius (DDG 69) operates in the Philippine Sea, March 9, 2019. U.S. Navy warships train together to increase the tactical proficiency, lethality, and interoperability of participating units in an Era of Great Power Competition. (U.S. Navy photo by Mass Communication Specialist 2nd Class John Harris/Released)