190927-N-ZZ513-1102 SAN DIEGO (Sept. 27, 2019) The U.S. 3rd Fleet Color Guard parades the colors during a change of command and retirement ceremony aboard the Nimitz-class aircraft carrier USS Theodore Roosevelt (CVN 71), Sept. 27, 2019. Vice Adm. John D. Alexander retired after 37 years of honorable service, relinquishing command of U.S. 3rd Fleet to Vice Adm. Scott D. Conn. (U.S. Navy photo by Mass Communication Specialist 2nd Class Natalie M. Byers/Released)