WALK AND TALK U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, talks with Australian Defense Force Chief Gen. David Hurley at National Defense University's Marshall Hall on Fort McNair in Washington, D.C., Nov. 21, 2013. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 241065-P-FIL50-190.jpg Photo Gallery