DAVIS-MONTHAN AIR FORCE BASE, Ariz. -- An F-22 Raptor (top), A-1 Skyraider (middle) and F-16 Fighting Falcon fly in formation during the Heritage Flight Conference March 7. Pilots of old and new aircraft come to the conference every year, to practice demonstration flights together before the start of the air show season. (U.S. Air Force photo/Staff Sgt. Samuel Rogers)