Chief of Defense Staff for the British Armed Forces Gen. Sir Nickolas Houghton, center left, waits to greet Chairman of the Joint Chiefs of Staff U.S. Army Gen. Martin E. Dempsey before a Guard of Honor ceremony kicking off a Defense Chiefs Strategic Dialog with the U.S. Joint Chiefs of Staff and their U.K. counterparts in London June 10, 2014. (DOD photo by Mass Communication Specialist 1st Class Daniel Hinton, U.S. Navy/Released)