SHOWTIME The Air Force Aerial Demonstration Squadron, the Thunderbirds, performs for about 25,000 people after the Air Force Academy's Class of 2011 graduation ceremony at the U.S. Air Force Academy in Colorado Springs, Colo., May 25, 2011. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 900464-C-IZX00-665.jpg Photo Gallery