and we saw that there were distinct differences between the signatures. even though it was just a millisecond. so if there is a little bit of sound, we can figure it out. >> so basically, even a millisecond could make a difference listening to that? >> you can tell whether its a high order explosion or a more low order event like a decompression and a tearing apart of the aircraft. >> richard, we know that the credibility of the russians. what they're going to say, the credibility for that matter of the egyptians, they have a lot of motives, if you will, to put various spin on what may be coming out. what kind of trust, what kind of credibility do they have in providing this kind of information to the world right now? >> reporter: the basically they are on trial and tested. i spoke this afternoon, wolf, to the egyptian tourism minister, he first of all said that he