director, barry k give us a look, maybe an aerial view of just the incredible widespread destruction there. is that why it is so hard to find this data recorder? do investigators even know the exact place where that plane hit the mountain? reporter: yes there are thousands of pieces thousands of small pieces of debris just scattered on a ravine. that s the problem. it s a very dangerous place to work from for the investigators. they said today that there are rocks falling. it s very slippery. you need to move in a grid formation from the top of the mountain to make sure that every corner of that crash site is calmed. those pieces and body parts and remains are scattered all over the place. this makes the recovery operation very very difficult. and we know that it will take certainly not days but weeks, if