151109-N-AT895-088 WASHINGTON (Nov. 9, 2015) Chief of Naval Operations (CNO) Adm. John Richardson shakes hands with Commandant of the Marine Corps (CMC) Gen. Robert Neller during a cake cutting ceremony in honor of the U.S. Marine Corps 240th birthday at the Pentagon. (U.S. Navy photo by Mass Communication Specialist 1st Class Nathan Laird/Released)