DEFENSE DISCUSSIONS U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, meets with Colombian Army Gen. Juan Pablo Rodriguez Barragan, chief of Colombia's Joint Chiefs of Staff, at the Pentagon, Sept. 25, 2014. The two defense leaders met to discuss issues of mutual importance. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 859084-M-UWR01-834.jpg Photo Gallery