controller could have landed the aircraft. >> reporter: right now, auto pilot systems are manually switched on and off at the discretion of the pilots in the air. auto pilot cannot land or takeoff. this potential solution could present a new problem. >> this is not necessarily hack proof. >> not hack proof. terrorists may be able to get into the data stream and force the plane to land or do whatever. >> reporter: has boeing advanced the idea from ten years ago? is the company still testing it out? we tried to get information from boeing on the project. the company would not speak to us about it. brian todd, cnn, washington. that is cnn newsroom. i'm errol barnett. thank you for spending your weekend with us. for you in the u.s., "new day saturday" is next. for everybody else, "cold war" is next.