>> mary, officials are now reviewing the plane's black boxes. how soon might they have a hint of what might have gone wrong? >> well, i think they probably already have a pretty good idea what's on there, the cockpit voice recording is literally you download it and listen to it. now, experts have to decide for the sounds on it. and the flight data recorder kind of looks like several lines -- many lines of an ekg, if you will. and that takes analysis. but here's the problem. if it was a sudden explosion or rapid decompression, a sudden catastrophic event, which according to the flight track that's what it looks like happened, the leads off of the recorders may have been destroyed and come off. and in many crashes where it is a catastrophic event midair, the cockpit voice recorder and flight data recorder do not contain much information other than the sound of a catastrophic explosion. however, in many cases our national transportation safety board has been able to analyze the sounds of the explosions and