British Royal Navy officers play tennis at the Army Navy Country Club, in Arlington, Va., July 31, 2014. The First Sea Lord and Chief of Naval Staff of the British Royal Navy, Adm. Sir George Zambellas, not shown, is taking part in the Commandant of the Marine Corps' Counterpart Program, which invites foreign military leaders to visit and interact with U.S. military leaders. (U.S. Marine Corps photo by Cpl. Michael C. Guinto/Released)