Bollocks to the crass stupidity of the moronic conspiarcy theories, my query is about building design.

A large aircraft crashes into a building full of uel. Eventually the floors above the aircraft collapse and fall to the ground. Why, does the rest of the building collapse? It collapses due to the weight of the falling structure above - this shoudln't happen. Surely, that is a major fault in the building's design. Why has this fact never been discussed in the media?