sometimes the battery malfunctions. sometimes the pingers are damaged or knocked off in the accident sequence. and sometimes they re just positioned under wreckage such that they don t pick up the sound unless they re literally right on top of it. it could be a factor of any of those or they just haven t gotten to the part yet. but when they get to the big piece of the plane hopefully they ll still be there. but in many accidents they just don t work. and finding the bodies of course that is their first priority. but these black boxes, if that s the most important, david, outside of finding the bodies that s going to tell them what happened to this plane. that s right. and the combination of the cockpit voice recorder and flight data recorder together is what paints the whole picture because you see not only what happened to the aircraft but you get a glimpse into what was going on in the decision-making of the pilots and that can give you a real benefit as far as looking forward a