In 1981 the United States Air Force recognized the need for a modern air superiority fighter to replace the F-15 and F-16 sometime in the mid 1900's. The study program was codenamed "Senior Sky" with the System Program Office (SPO) headed by USAF Col. Al Piccirillo. The future Advanced Technology Fighter (AFT) would use stealth, extreme maneuverability, the ability to go supersonic sans afterburner and the capabilities of long range and internal carriage of its weapons. Two aircraft evolved for this contest: The Lockheed YF22A and the YF23A. The test YF-22A had proved itself capable of supersonic fight without use of afterburner, termed "supercruise mode;" it proved capable of maneuver at extreme high angles of attack with complete control and it fired two different types of missiles and inflight refueling was a standard test procedure. Kit includes a detailed cockpit, wheel wells and landing gear, and complete weapons systems.