Secretary Gates shakes hands with Gen. Peter J. Schoomaker. Secretary of Defense Robert M. Gates shakes hands with Gen. Peter J. Schoomaker after presenting him with the Defense Distinguished Service medal while his wife Cindy Schoomaker watches during the U.S. Army Chief of Staff change of responsibility ceremony at Fort Myer, Va., on April 10, 2007. Schoomaker was succeeded by Gen. George W. Casey who became the 36th Chief of Staff of the Army. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 626070-E-CWX66-480.jpg Photo Gallery