LEADERSHIP LECTURE U.S. Defense Secretary Robert M. Gates receives a round of applause from U.S. Air Force Academy cadets at lunch after giving a lecture in Leadership and Policy during a visit to the Air Force Academy in Colorado Springs, Colo., April 2, 2010. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 772073-O-RXN47-945.jpg Photo Gallery