i m carol costello. thank you so much for joining me. there is a new twist in the disappearance of malaysia flight 370. when the co-pilot said, all right, good night, to air traffic controllers at 1:19 a.m. on saturday, the plane s on board computer had already been reprogrammed. in fact, investigators tell cnn, someone rerouted the flight a full 12 minutes before the co-pilot said those last words. martin v martin savidge is inside the boeing sim mu lulator along wit mitchell casadoe. it has added new insight into the investigation and what may have been going on inside the cockpit. as you point out, there was sort of a 12-minute heads up that they were going to make this change. it wasn t spontaneous.