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I read about the remote controlled planes, I think that a video surveillance system will make a lot easier the decision to take the control from the flight crew. Hidden cameras in hot spots of the plane will tell to the traffic control centre, where the plane is in that moment, if is any security risk on board. Any discrepancies in the plane trace should pop-up images from that plane on the monitor next to the radar screen of the controller in charge in that moment. From flight crew point of view, in case of emergency, they can ask for ground support, just pushing a button. And if the remote control centre is in NORAD, let say, hard to be hijacked.