170424-N-BL637-139 PHILIPPINE SEA (April 24, 2017) An MH-60R Sea Hawk helicopter from the "Blue Hawks" of Helicopter Maritime Strike Squadron (HSM) 78 fires chaff flares during a training exercise near the aircraft carrier USS Carl Vinson (CVN 70). U.S. Navy aircraft carrier strike groups have patrolled the Indo-Asia Pacific routinely for more than 70 years. (U.S. Navy photo by Mass Communication Specialist 2nd Class Sean M. Castellano/Released)