Europe's Airbus is reportedly testing the first "hijack-proof" airliner, designed as a final method of defense against terrorists who succeed in slipping through airport security.

Such a plane could steer itself away from tall buildings, according to the aerospace consortium... as well as keep a close on passenger actions and conversations, by utilizing closed circuit television and microphones throughout the cabin.

As the final resort, biometric sensors could detect if someone other than the pilot has their hands on the controls... and keep the plane on its course, no matter what. Those methods go far beyond reinforced cockpit door, and onboard undercover air marshals now employed.