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They're operating during flight. that operation can be transmitted to control centers on the ground, so aircraft data and air speed and altitude and engine data can be seen on the ground. according to "the wall street journal" information is sent every 30 minutes and much of this is for maintenance purposes. if maintainers on the ground have information how the different aircraft systems are operating they can be quicker in their turn-around. >> you have to subscribe to the service and my understanding malaysian airlines did not do that. >> there's some conflicting reports -- >> imagine. >> i'...

What do you make of it? >> well, what i make of it is there is probably some justifiable outrage. if you're there, you're in charge of the investigation -- now, certainly, the malaysian investigation is not a model so far, although we don't know everything, but if you're there trying to do the investigation and then rolls royce and boeing are there with you and you get news from the "wall street journal," you know, a very major news source, that their information is different than what the parties to the investigation, rolls royce and boeing, are telling you, i would imagine you'd get more tha...

Downloads. you erase it if nothing happens. the other thing is onboard streaming video. after september 11th in addition to the black box issue, why don't we download this continuously in the flight. why don't we have onboard video that can take snapshots or can stream from both the cockpit or cabin depending on what's going on? and those issues came up again in air france 447 because it was missing for awhile. we get the engine data, but not anything from the black boxes. the reason was several groups objected on privacy issues. now, legally there's no way you have a privacy issue in an airpl...

That would suggest his leg's on, that his story's accurate. ten seconds, i got to wrap it up. >> in the end what difference does it make he had the legs on or off? the real question is did they have a fight and was he shooting at her in anger through that door? we'll see how the attorneys sum that up in the end. >> lots more to go. paul, thank you. as always appreciate it. out of time. thanks for watching everyone. my colleague, wolf blitzer, takes over now. wolf blitzer reporting from washington. confusion and contradictions, that's what investigators are coming up with six days into the di...

A sort of certain way that it's transmitted. as you know, richard, the engine -- it's like taking the health of a patient really in hospital. the system is not meant to prevent a failure, but it's a system that's meant to help engine makers and the airlines predict perhaps a maintenance event by monitoring the trends it's showing. so this data is meant to be a long-term feed, as you know. so what puzzles me is that the engine data also comes down the same pipe as the acars data we're familiar with. so if it was turned off, how is it feasible that engine data could also be coming down? there is...