Newly commissioned U.S. Air Force second lieutenants toss their hats into the air. Newly commissioned U.S. Air Force second lieutenants toss their hats into the air while F-16 Fighting Falcon aircraft from the Air Force Aerial Demonstration Squadron “Thunderbirds” fly over the U.S. Air Force Academy graduation in Colorado on May 27, 2009. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 143132-K-WJD29-418.jpg Photo Gallery