Chairman of the Joint Chiefs of Staff Gen. Martin E. Dempsey and his wife, Deanie, walk up the stairs to depart London after a three day trip where he participated in the Defense Chiefs Strategic Dialog and spoke to students of Joint Services Command and Staff College with U.K. Chief of Defense Staff Gen. Sir Nickolas Houghton, June 11, 2014. (DOD photo by Mass Communication Specialist 1st Class Daniel Hinton)