An F-22 Raptor flies above Davis-Monthan Air Force Base, Ariz., during Heritage Flight Conference, March 5, 2011. Heritage Flight Conference readies Air Force demonstration teams and their civilian counterparts to conduct formation flights for air shows each year. The U.S. Air Force Heritage Flight program presents the evolution of Air Force air power by flying today's state-of-the-art fighter aircraft in close formation with vintage fighter aircraft. An HF performance involves a current Air Force fighter piloted by an Air Combat Command single-ship demonstration team pilot and flown with a historical war bird piloted by a trained and certified civilian HF pilot.