U.S. Air Force Academy graduates throw their hats into the air as the Thunderbirds fly overhead, signaling the end of the Air Force Academy graduation ceremony in Colorado Springs, Colo., May 30. Photo by Cherie A. Thurlby (released) U.S. Air Force Academy graduates throw their hats into the air as the Thunderbirds fly overhead, signaling the end of the Air Force Academy graduation ceremony in Colorado Springs, Colo., May 30. Photo by Cherie A. Thurlby (released) SHARE: Download: Full Size (1.41 MB) Credit: VIRIN: 594370-O-HRK77-394.jpg Photo Gallery