150715-N-AT895-157 LONDON (July 15, 2015) Chief of Naval Operations (CNO) Adm. Jonathan Greenert delivers remarks during a moderated talk focused on the future of the British-American naval alliance at Chatham House, the Royal Institute of International Affairs. Chatham House is an independent policy institute based in London. (U.S. Navy photo by Mass Communication Specialist 1st Class Nathan Laird/Released)