that the malaysians are using for making their decision. it would seem they would have to have, you know, a radar plot that showed the aircraft coming down. it doesn't instantaneously lose altitude. so right as we're working and the aircraft came down to 5,000 feet, and so, was in the radar shadow, you would see the descent on the radar screens, and my understanding of the data is that's not what happened. so, there would have to be some other corroborating evidence to draw that conclusion. >> let's talk about that evidence, sir, because -- and we've been getting conflicting signals and information, you know, days after, for some time now. even now, whoever said the last words in the cockpit, now we know it was the pilot. we think it was the pilot, not the co-pilot. that's different than the earlier information. how confident are you that this information coming from officials is correct?