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150724-N-JO908-163 (July 24, 2015) SAN DIEGO Vice Adm. Nora Tyson, left, assumes command of U.S. 3rd Fleet from Adm. Scott H. Swift, commander U.S. Pacific Fleet during the Commander, U.S. 3rd Fleet change of command and retirement ceremony aboard the Nimitz-class aircraft carrier USS Ronald Reagan (CVN 76). Tyson relieves Vice Adm. Kenneth E. Floyd as he retires after 35 years of honorable service. (U.S. Navy photo By Mass Communication Specialist 2nd Class Kory Alsberry/Released)