to seraiah,
it’s assumed muslims were at the controls of the purported planes, therefore culpable of at least trying to bring down the towers. no planes, no muslims, unless you think the mainstream media (msm) is muslim-controlled.
acidic dust is not going to set engine-blocks on fire (with no gas-tank explosion) when the cars are nowhere near the impact zone, . can you show me anything that looks like that car damage? some cars may have been moved, others certainly weren’t (the photos are not long after the destruction). this postal truck doesn’t appear to have been moved.
http://www.hybrideb.com/source/eyewitness/complex/001.jpg
these disfigured cars are in a carpark, not having been moved.
http://drjudywood.com/articles/DEW/dewpics/Image8.jpg
the planes disappearance is mysterious for the reason you have mentioned. aluminium being softer than steel or concrete, when the fusilage hits the harder skyscraper, it breaks up instantly, hard parts like engines and flaps etc. separating from the softer body. much of the debris would fall into the street and not be swallowed up by the building, as the videos would have us believe.
if the plane is hard enough to slice through the exterior of the building, it’s hard enough to leave plenty of parts as evidence. that evidence has not been offered for verification.
there was plenty of aluminium cladding from the wtc that remained intact, not all metals suffered degradation. this is part of the strangeness of the event. so i’d have expected to find plenty of aluminium bits of plane spread around the zone. this clip makes the point about planes slicing neat holes in buildings.
http://www.youtube.com/watch?v=JO_oNEaUCyc&feature=player_embedded#at=58