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In different places. at that time he seemed to suggest they were coming from the two separate black boxes. >> absolutely. you know, if it is only from the flight data recorder, remember the cockpit voice recorder has a two-hour loop on it. you're going to get a lot of information from the flight data recorder, particularly if there was no real conversation going on going on in the cockpit. >> this is the flight data recorder, peter, as you well know. this is the little pinger over here that sends out those critically important pings, those signals thalts would help to try to find this. and the...

Currents maybe washed over. it's almost like finding buried treasure on top of everything else they're looking for. >> are you hearing, rene, that the pings are coming from the flight data recorder, not the cockpit voice recorder? just just one of the two boxes? earlier a few days ago we heard authorities say that australia they think they had two separate pings which would indicate they're come from two separate locations, two separate boxes. >> now, i did hear angus houston say that. he specifically said after analyzing the pingers, they are consistent with the flight data recorder. now, i b...

Hyperbole. >> he's optimistic. not cautiously optimistic as he said a few days ago but he's optimistic right now he says. michael, thank you, michael holmes in perth, australia. aviation correspondent rene marsh is with us as well as aviation analyst mark wice and peter goles and law enforcement analyst tom fuentes. how chose are they, mepeter to finding the two black boxes and plane? >> they're closer but not close. this is still a long struggle. four pings 17 miles apart. they've still got to narrow it down. if the pings die out, we're in for a long slog. so i'm optimistic as the vice air ma...