plastic material that might e out there. but one of the things they're going to be looking at and one of the things that's a significant part of this investigation that needed to be ruled out eventually is looking for fire and soot and other evidence of a preimpact fire very well still may be on the wreckage, so it doesn't rule out the ability to see those type of evidence or clue. >> we know they're looking ultimately, talking about the debris field, they want to trace it back to the black box to find out what happened. is it possible if you're flying a plane, you're in the cockpit, don't know if anything nefarious happened, could you mess with the black box or is it perfectly intact safe, no one can -- >> there's no access from the cockpit. at the most, a circuit breaker which could turn it off, but it is way in the back of the plane, it is back there for a reason, to protect from crash impact forces. >> in the tail section. >> yes, it is attached -- some