Dempsey Teaches Leadership Course at National Defense University Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, speaks at a Keystone course at the National Defense University on Fort McNair in Washington D.C., Jan., 15, 2015. The course objective is to educate command senior enlisted leaders. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 715403-C-LFV06-636.jpg Photo Gallery