Can anyone explain to me how an airliner, supposedly shot out of the sky @ thirty thousand feet is leaving seats, bodies that are identifiable, engines, parts of the plane, luggage, etc. Yet the aircraft on 9/11 in Shanksville PA, and at the Pentagon left absolutely nothing? No bodies, seats, luggage, engine pieces. Nothing. Nada. What was so incredibly different about the way these aircraft crashed that would obliterate everything?