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David. is it possible with your experience with these units that it can actually record more than two hours, or do you know for sure its strictly two? >> it records over it again. they made sure what was on there before is not retrievable. >> heres my question. how long before they find the black boxes? >> you know, i hate to speculate on behalf of the families. i want to qualify this and say -- >> you have done this before. you know a reasonable amount of time. >> absolutely. what i would say a...