data recorder. if there is something nefarious going on if transponders and things were turned off, the black boxes can be turned off from the cockpit. so it could be that these boxes don't have any information on it if there was something with intent done to that aircraft, as well. if it is not available, there's a lot of information you cgain the materials if it was a fire inside, a lot of information we would be able to gain from wa is going on including without being too morous but the condition of the bodies, the lungs and that sort of thing as well which are part of the session. >> you think they will be able to find enough of the material then. considering you said it could be scattered for miles. >> i do believe that. hundreds of miles would be more than i would expect on this.