Many people in NZ still think that the twin towers were actually brought down through the impact of the two planes that hit the towers. This is scientifically impossible. The amount of energy that was freed up trough the impact and the kerosene was immaterial to the actual structures. the towers were designed to take the impact of one or even more of these planes.
Listen to Frank diMartini (the structural engineer for the WTC towers, who perished in the attack) explain this
Than let Gordon Ross explain what really happened
Aotearoa: A Wider Perspective 