debris, what's the best we can learn from this. >> look at these pictures. first of all, the picture on the left, that's the bit that connects to the plane. the other bit goes out the back, the trailing edge. what you are looking at is how did it rip apart from the plane? was it deployed, was it at a ten, 15, 20-degree angle when it left the aircraft? that will tell you how the plane went in to the water. did it go on an angle, with the tail first, belly flop? all of that. look at the back end of that and you'll see how it has been wrenched aside. they will need to work out is that from a year in the water or was that the violent moment of impact with the ocean? >> it won't tell us precisely where the rest of the plane is? >> when you reverse drift that, it will take you roughly back to the area but no. >> no precise location.