INVERTED FLY-BY Two U.S. Air Force Thunderbirds perform an inverted formation fly-by during the Thunder and Lightning Over Arizona event at Davis-Monthan Air Force Base, Ariz., April 13, 2014. In addition to 14 aerial demonstrations, there were more than 40 aircraft static displays during the event. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 408905-B-CGK45-236.jpg Photo Gallery