accidents occur or begin at cruise altitude. takeoff and landing are the challenging points. this is going to be an interesting and difficult investigation. >> it does sound like that. 30,000 feet. that is kind of the calm area of flying for many pilots. that reportedly went down something like 6,000 feet per minute. will that kind of tell you that when the plane did go down, that it was intact, mink when it does hit ground, the debris field might be tighter than, say, if the plane broke apart during its dissent and trying to locate those boxes would be complicated? you will have to look at the radar tracking and see if any