Chairman of the Joint Chiefs of Staff Gen. Martin E. Dempsey speaks to students of the Joint Services Command and Staff College during a question-and-answer session with U.K. Chief of Defense Staff Gen. Sir Nickolas Houghton at the Defense Academy of the United Kingdom in Shrivenham, U.K., June 11, 2014. (DOD photo by Mass Communication Specialist 1st Class Daniel Hinton)