Containing the valuable information is wrapped in thermal insulation. they are designed to withstand impacts 3,400 times the force of gravity, can survive flames up to 2,000 degrees for an hour and can withstand extreme cold. investigators won't say if they heard voices in the cockpit up until the moment of impact. what they're doing right now is analyzing the audio to determine what sounds they hear who is speaking. as far as the debris field, investigators say the size of the field suggests that the plane broke up on impact and not midair. they can look at the size of the pieces and how wide...