wreckage when it is confirmed that it comes from flight 370, is going to give just two basic facts. one, the plane is in the water. two, we are looking in probably the right space. >> does this tell us down -- >> it's down off of perth. >> does this tell ug the plane crashed in the water while intact or there is a possibility this particular part dropped off ahead of the crash? >> well we don't know that yet. they're going to look at the fracture surfaces. and see under an electron microscope they'll be able to determine exactly how this plane -- this part of the plane separated from the wing. and it will give us some indication of how the plane hit the water. it looks to many of us as though this piece might have separated from the plane before it plunged into the water because there's not a lot of compression damage