oh franck don't get afraid you could be the only one left, beliving the official story of towers collapses because of fire..
as i said, it's logic.
for you franck:
http://www.physicsclassroom.com/Class/1DKin/U1L5a.html
and then just imagine a tall skyscaper building..
how could a skyscraper collapse with nearly free fall speed without detonations..? it's unpossible. it fits in the picture, sending the steel to china, so that all evidence from explosives are vanished..
btw: you don't answered my questions..
what happend to building 7, why did it collapse? why was it 'pulled'?