box recorders. >> and obviously the weather is a factor in trying to make sure that they find all of these parts of the plane. what about the tracking technology that is being used, satellite technology being used? we saw nothing was helpful in finding mh 370, but in this case, do we have the tech knowledge to make sure enough of this plane is found so that investigators can figure out what happened? >> well, i think by the fact that we found the surface wreckage, that's not going to be a real question in the case of this wreckage. certainly a question for the possibility of accidents in the future. that's a huge public policy question. your ability to track planes more exactly in the air or find out what is handling aboard them mechanically in real time. but now that they think they're in the area where they can find the main body of the wreckage, tracking no longer becomes an issue. but this is not far from the