Abstract: Mark R. Haley has procedures and technology, which would prevent hijacking of aircraft. This system would include a password protected autopilot system, which is automatically engaged if the pilot opens the cockpit door after takeoff or if the cockpit door is forcibly opened. The password-protected autopilot could only be overridden by the pilot (or co pilot who has the password), or by a ground controller in case of emergency. Then a hijacking could not take control of the aircraft. “911 Autopilot” is a low cost variation, which simply delays disengagement of autopilot until a military escort arrives. The military escort could remotely control the release of the autopilot or a simple time delay could release autopilot. In either case, the hijacked plane would be under military escort and therefore it would be unable to be used to ram buildings.