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Entirely gets into it like a very soft mattress almost. you kind of fall into it and go away. >> you have experienced the -- many depths, and what do you see? are you seeing what he is seeing? the silt, do you think it will be covered? >> no, i don't think so. because there are currents, you cannot avoid the visibility, that happened very often on the titanic, some days we don't have good visibility but some days we have a good one. it it could be -- that thing can change very fast. >> and speaking of the titanic, you used sonar technology to help to find the technology, right? tell us about t...

Seas, not very many white caps, which means it's relatively easy to see debris that may be floating on the water. so you know, when you have more rough surf, the problem is, is it's very difficult visually to get a good look at what may or may not be there. and the weather also affects the underwater search as well, because when you have clear conditions like this, the pinger locator that's being towed behind the australian ship, the "ocean shield," it can listen for longer. when you have rough currents, it actually affects the sonar technology. you know, there's a british ship with this side-...

A third party or the aircraft could have been commandeered by a third party, someone who would have the technical knowledge and skills necessary to operate the aircraft themselves without the crew. so any of those scenarios is plausible at this point. >> cary walsh, if this plane is in the southern indian ocean, the topography underwater, how much does that play into the difficulty of retrieving the ever-so-important black boxes? >> well, it's going to play a lot into the difficulty. the area they're searching is gigantic and unless they're able to get people on the water and actually pick up ...

Plans to move in any assets. that could change but as of everything we know right now we do not have plans to move in additional assets. >> tom costello who covers aviation. i want to give tom a chance to follow up on any of these loose en since you're taking the time to talk to us. >> as it relates to the equipment you're able to deploy in the indian ocean, are you dropping any sonar ability so that you can listen for pings from the black boxes and operately on the p-3 orion, can you talk about the ability to locate wreckage or spot wreckage. i read somebody can could literally spot a basketb...

Before the winter olympics in sochi in russia, but security concerns not going away. two terror attacks just before new year's left dozens dead only a few hundred miles from sochi, and there are real questions this morning if the russian government will be able to keep these games safe. dia diana magna is in moscow. what's the latest? >> reporter: well, today the surveillance zone around sochi goes into force, so no vehicles that aren't registered except for emergency vehicles and except for the intelligence, the vehicles used by intelligence can go into that zone. you'll be very strictly moni...