150715-N-AT895-042 LONDON (July 15, 2015) (July 15, 2015) Dr. Patricia Lewis, PhD., research director for international security at Chatham House, Chief of Naval Operations (CNO) Adm. Jonathan Greenert, First Sea Lord of the Royal Navy Adm. Sir George Zambellas and Secretary of State for Defence Michael Fallon, member of parliament, participate in 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)