1.........An F-22A Raptor from Langley Air Force Base, Va., an F-4 Phantom from Holloman Air Force Base, N.M., an F-16 Fighting Falcon and an A-10 Thunderbolt II fly in diamond formation over Tucson, Ariz., Sunday, March 5, 2006, during the Air Combat Command Heritage Conference at Davis-Monthan Air Force Base.

2.........World War II-era P-47 Thunderbolt and an A-10 Thunderbolt II fly side by side during the 2006 Heritage Conference. The conference combines different U.S. aircraft from more than 60 years of aviation history to ensure certification in performing air shows worldwide.

3..........An F-22A Raptor and a World War II-era P-51 Mustang fly over Tucson, Ariz., Sunday, March 5, 2006, during the 2006 Heritage Conference. The conference combines different U.S. aircraft from more than 60 years of aviation history to ensure certification in performing air shows worldwide.