151117-N-WO404-036 ATLANTIC OCEAN (Nov. 17, 2015) Arleigh Burke class guided-missile destroyers USS McFaul (DDG 74) and USS Chafee (DDG 90) steam behind aircraft carrier USS George Washington (CVN 73) during a photo exercise. UNITAS 2015, the U.S. Navy's longest running annual multinational maritime exercise, is part of the Southern Seas deployment planned by U.S. Naval Forces Southern Command/U.S. 4th Fleet. This iteration of UNITAS is conducted in two phases: UNITAS PACIFIC, hosted by Chile in October 2015 and UNITAS Atlantic hosted by Brazil in Nov.. (U.S. Navy photo by Mass Communication Specialist 3rd Class Jonathan Nelson/Released)