point to a somewhat lack security policy. jon: and a lot of people were scratching their heads about what happened here. talk about the black boxes. one of the the concerns that i have is that perhaps they might not get a lot of information off of them just because they do loop over. they record over their previously recorded data after a certain period of time. don't they? >> well, that's true. the cockpit voice recorder does. it only holds 120 minutes' worth of information but again, that's just from the microphones in the cockpit. jon: so if the pilots were incapacitated the last two hours of the flight, we're not going to hear anything. >> no. absolutely not. but the data recorders in terms of the systems, what was the -- how were the engines doing, what was the state of pressurization, the electrical system, all that will be intact if they find that