150918-N-AT895-146 ANNAPOLIS Md. (Sept. 18, 2015) Chief of Naval Operations (CNO) Adm. Jonathan Greenert salutes sideboys during a change of office ceremony held at the U.S. Naval Academy. During the ceremony, Greenert is relieved by Adm. John Richardson as CNO. (U.S. Navy photo by Mass Communication Specialist 1st Class Nathan Laird/Released)