Allen Deale News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> right. >> and we are zeroing in on both of the devices. and remember, he said also that when they made the turn and came back, what they detected had a slightly different frequency, meaning it might have been the second one. so that we may have both in this narrow field at this point. >> allen deale, we still don't know if this is it. we're being encouraged to be cautiously optimistic. we still don't know. but these are pretty positive indicators. >> absolutely. clearly, they don't want to raise the expectation until they really know. but this is -- this is extremely encouraging. and i cert...

And that means finding wreckage. as of now, they still haven't found anything that's anything to do with flight mh flight 370. the prime minister of malaysia was also briefed by those running the search operation here. angus houston, the australian in charge told him that the search was going on, there's no timetable behind it. but he also warned that -- and this is the first hint of perhaps a slight change of strategy, that if they continue to find nothing, then a new approach might be needed. back to you guys. >> nbc's ian williams in perth, thanks so much. >> with us now is dr. allen deale,...