110923-N-AC887-001
ANNAPOLIS, Md. (Sept. 23, 2011) Secretary of the Navy (SECNAV) the Honorable Ray Mabus presides over a change of command and retirement ceremony where Chief of Naval Operations (CNO) Adm. Gary Roughead was relieved by Adm. Jonathan W. Greenert as CNO. (U.S. Navy photo by Chief Mass Communication Specialist Sam Shavers/Released)

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