discovery and examination of the part, the flaperon that's part of the wing's plane, can they determine, based on that alone, whether the plane crashed due to mechanical error or foul play in. >> no, they can get a good idea of the force exerted on the plane when it hit the water. the size of the piece suggests it didn't fall. the pieces on the accidents like that that i have worked are very small. everyone knows what the image of german wings wreckage looks like. they have a clue as to the configuration of the plane when it hit the water, but, of course, not why it was in that situation. >> the investigators, there are a lot of them, tom, that are looking now. there are malaysian authorities, french authorities, boeing officials are taking a close look at all of this. representatives from the u.s. government. are they working together?