They collapsed owing to structural failure, following a passenger jet being purposly rammed into each of them. The intense heat caused by jet fuel igniting, weakend the structural steel both inside and outside of the buildings.
The Empire building didn't fall down.
Controlled demolation it seems. Blg. 7 was untouched by aircraft and didnt have the fuel that is claimed to have brought down the other 2 blgs.
A building that can resist earthquakes can fall down if you put more pressure on them then they were designed to withstand. For example if there was to be a major subsidence directly under half of the building it is likely that it will fall over.
the building fell because it had a weak foundation so it collapsed
Yes, a cat fell off a building.
rain?
To ensure that the building does not fall down.
i think he jumped of a building
dead
Edifice is a 7 letter word for building.
Next year - 2011 - December 7 will fall on a Wednesday.
no