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Deployed from the australian defense vessel, "ocean shield," has detected signals consistent with those emitted by aircraft black boxes. two separate signal detections have occurred within the northern part of the defined search area. the first detection was held for approximately 2 hours and 20 minutes. the ship then lost contact before conducting a turn and attempting to reacquire the signal. the second detection on the return leg was held for approximately 13 minutes. >> reporter: houston went on to say that these signals are consistent with the characteristics of an inflight data recorder ...

Pinger locator. tpl. that is strapped to an australian ship -- it's what could possibly be signals to the plane's black box. today it is all about re-establishing those things. once that happens, the navy's mini-subwill be deployed to snap pictures of the ocean floor, which could possibly maybe provide concrete evidence of where the plane ended up? be it nbc's ian williams that's in perth, australia for you. >> it is being described as the most promising lead. the best information in a month of fruitless searching. the search coordinator is urging caution. a u.s. navy device towed hinted an au...

Aircraft involved in this, four surveillance aircraft, comprising australia, new zealand and u.s. assets, and the first flight understood to have gone out about 6:00 this morning, so it should be coming back fairly soon. these flights, we're being told, were diverted, obviously, to this area where these objects were found. the australian prime minister, as you say, is coming out and saying this publicly, briefing the parliament, which does suggest that this evidence, which he describes as credible, indeed could be that link we have been looking for after so many days. now, the head of the actu...

Those long runways. if they were looking for somewhere to land, they would have known. certainly a captain of 18,000 hours experience would have known the territory upon which he was flying. so, again, i urge you -- and i know it's not very sexy in a way, i urge you to just think of this as a piece of the jigsaw that has been put on the table rather than the picture itself. >> you're urging caution, richard quest. >> i always urge caution. the temp indication -- all right, if you look at what we've got now -- >> right. >> the scenario we've got. the turn, the flight back over malaysia, into th...

Monday. we're now friday awaiting his response. and the coverage has been split, even on the left and on the right. you have rush limbaugh, arguably one of the most powerful conservative commentatetors urging caution. you have glen beck saying this could be world war iii. the economists saying hit him hard. jimmy carter saying i don't think we should do this. there are all of these different opinions that could be pushing on obama's decision whether or not to go. jon: and are, are the media giving adequate coverage to the motivation hyped all of this, judy? >> well, for the media a lot of the ...