180216-N-PE636-147 ATLANTIC OCEAN (Feb. 16, 2018) Royal Norwegian Navy frigate HNoMS Roald Amundsen (F 311), right, and USS Winston S. Churchill (DDG 81) transit the Atlantic Ocean as part of the Harry S. Truman Carrier Strike Group (HSTCSG) while conducting its composite training unit exercise (COMPTUEX). Truman is underway for COMPTUEX, which evaluates the strike group's ability as a whole to carry out sustained combat operations from the sea, ultimately certifying the HSTCSG for deployment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Anthony Flynn/Released)