The USAF Heritage Flight program was established in 1997 in support of the Air Force's 50th anniversary. It involves today's state-of-the-art fighters flying in close formation with World War II and Korean War vintage fighters such as the P-51 Mustang and the F-86 Sabre. Its mission is to safely and proudly display the evolution of United States Air Force Airpower and to support the Air Force's recruiting and retention efforts. The Heritage Flight is done immediately after the modern fighter completes its flight demonstration. The warbird is already positioned in the air for a rapid rejoin immediately following the modern fighter's final maneuver. Once in formation, two passes are made along the showline and the final pass flown from behind the crowd to in front for a dramatic cross-over break in preparation for landing.