out that there is a radar trail? that's information you have right away. this is, again, i think another measure of how much uncertainty there is about this, not that there is certainty of a western route. >> all right, tom foreman, thanks so much. so, let's bring in our experts to try to answer some of these questions. tom fuentes and tom flores. before we dive in, gentlemen. at 1:07 the plane's data reporting system shuts down. just 14 minutes later at 1:21 a.m. the transsponder sent its last signal. now, authorities believe they were turned off separately and deliberately. i'll start with you, bob, does that mean we can rule out some kind of catastrophic event happened? >> i don't think we can rule out anything. this is so complicated and so much unknown.