sound means. >> president hollande of france in his speech said the black box has been found. as for the second black box, its outside frame has been found but unfortunately not the black box itself. at this moment, there are men in the field searching. how significant or important is it that they get the second? and does it dramatically hinder the investigation if they don't? >> it certainly does because in every investigation having both of them together and synchronizing what was said in the cockpit with what actually occurred is incredibly important so that you can understand if there was a failure between what i say i'm going to do -- if i'm going to push the control forward or go to the left or the right and the aircraft responds in a different manner, it will give us clues as to if something nefarious was going on on the aircraft or something mechanical. >> but if you haven't got it, they have to go with what they've got.