yet? reporter: ashleigh, we do. let me show you where. right now you can see where the arm, the 80-foot arm of the track is situated. we ve seen that arm go down into what seemed to be the cav earn. maybe we ll see this in a moment. they are trying to make sure they prevent any new debris from going into that hole. they send that arm down and pick up any new debris and bring it back. again, it was quite interesting, quite incredible quite frankly to see that arm go so far and from what we know, it could be 50 feet deep or 20 to 30 foot wide. it s a big cavern. the question is what is that foundation standing on? there s a concern that the foundation itself could collapse into the hole. you do find as you mentioned, a delicate process to remove the debris. it s hard to believe that they can t recover the body.