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expected to run out of the oxygen at 7:08 eastern time this morning. that is literally one hour and seven minutes from now. right now officials are unsure if those reported underwater banging noises are a sign of life but they are still treating it as a search and rescue operation. with respect to the noises specifically we don't know what they are to be frank with you. i can tell you it's inconclusive. again, i think the important pieces we're searching in the area where the noise was detected. >> todd: search expanded over 2.5 miles below the surface with more vessels and equipment...

You are friends with the french diver who apparently has been to the titanic 35 times. my question is we keep hearing that no one can get down there that far to where this submersible is to detect what's happened yet, i know you have been down there 22 files. he has been down there 35 times. do you just not go all the way down? why can't we get down there? >> we can get down there no problem at all. there is no existing submersible that's certified to go down there. so we use work class rovs to die to those depths there is six deployed on the sea bed around the area. >> brian: and those are un...