narrowed in on a close enough ar area. then if we get to this point, you might see other things, for example, the alvin, which could take a human being down there to take eyes on target and look at it or yoond that to the remora 6,000, the type of robot they used with air france to retrieve things from the bottom. right now, wolf, right now all of this technology is poised but only parts of it has been deployed at this moment. and as they move forward, they'll see how they can add more and more to this armada and hopefully, hopefully leads to the actual wreckage. wolf? >> all right. tom, thank you. let's dig deeper right now with colleen keller, senior analyst with the scientific consulting firm metron and worked on the search for air france flight 447. are you very confident those four pings were, in fact, coming from at least one, if not both of those black boxes, colleen? >> well, i have to trust the experts, wolf. they've told us that they've analyzed the signals, they've shown them to the people that