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.