they're not allowed to record it. and if it's used at trial, you have to get a court order. so they're very protective of the cockpit voice recorder but they will play it for families in a closed room but probably not this early in an investigation. >> sure. and miles, when you look at this, no voices have been identified. what if they are not able to discern who is speaking in the cockpit conversation? it sounds like they may not be able to. >> well, it's a nugget of information but we do have to be clear on this, and the terms they use are very important. to call this a cockpit voice recording, that's not so. she's at the bottom of the ocean. nobody has heard that. we're never going to hear that. those are never played publicly. these are air-traffic control tapes. the quality is significantly degraded compared to the cockpit voice recorder. it can be very difficult to identify voices and who is talking, particularly if they have similar intonation. the only shred of evidence here would be that, you know, standard operating procedure would be the first officer would be working the radios.