When molten aluminium came into contact with water it created multiple catastrophic explosions in the wtc towers which resulted in damaging the structure. There may have been devices planted to damage load carrying beams to guarantee maximum damage.
What has always bothered me is how Bin Laden who was closely connected to the Cia and the Bush family would go on to attack the Usa. Did the Usa betray him?
Did the Bushs' cheat his familiy in a business deal, what was it that caused him to do what he did.
Or is it more simple, that he was not acting as a enemy buth rather as a hired terrorist to give the neo cons what they wanted for a long time, a new Pearl Harbour event so the United States could unleash the full might of it's military forces under the idea of revenge and justice. Where as to do so without a wound would have been close to impossible and even if possible it would have been seen as neo colonialism, imperialism, hedgemony etc.
And when I say hired I don't necessarily mean hired by the Usa, it could have been Israel, Saudi Arabia, Britain or even a international conspiracy among many nations.
I do not see current events in Libya and Syria as separate from 911 and the Iraq war.