martin, put it into context. we are trying to figure out why the pilots never communicated with the tower, given the information. the reason the new york times has this report is because they say they know the acars monitoring system recorded the strokes were in there. assuming the system was still up and working which is how they got this reporting, what is the reason they wouldn't be communicating with the tower if it was such a casual change to make? >> well, i mean, it would imply there's obviously some effort by whoever made the course change. they're shutting down the transponder. the plane is no longer pinging on radar. then the next thing they would do later shut down the acars system. we know this information came from the acars system still active. a short time later, it went off. we don't know where the plane is is now. >> that's absolutely correct.