150928-N-OX430-044 ATLANTIC OCEAN (September 28, 2015) Ensign Susannah Johnson looks through a laser range finder to measure the distance of the dry cargo and ammunition ship USNS William McLean (T-AKE 12) from the Arleigh Burke-class guided-missile destroyer USS The Sullivans (DDG 68) during a replenishment-at-sea approach exercise. The Sullivans is transiting the Atlantic to participate in Joint Warrior, a United Kingdom-led, multinational cooperative training exercise designed to prepare NATO and allied forces for global operations.