SUMMIT ANSWERS Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, answers questions during the Defense One Summit in Washington, D.C., Nov. 19, 2014. The discussion, hosted by Defense One Executive Editor Kevin Baron, covered topics related to the purpose of today's military and national security. SHARE IMAGE: Download Image: Full Size (0.05 MB) Photo By: VIRIN: 809309-D-BYA73-666.jpg Photo Gallery