[Tuco-bad]

That's ridiculous. It wasn't too expensive, it was IMPOSSIBLE. They would have had to take the 67 floors down and start over. You can't suddenly add tons of concrete to the top of the structure, the weight is one of the main factors in the design of any building.

Agreed!

So the choices were stop building at the 67th floor level or "invent" a new fireproofing technique.

[hellinahandcart]

Agreed!

Then you agree, there was no "choice 1" and you were wrong to say it was ever an option.

[Fry]

So the choices were stop building at the 67th floor level or "invent" a new fireproofing technique.
Is innovation a bad thing? When you run into difficulty, should you just throw your hands up and say never mind?
The fireproofing they "invented" would have worked fine under any normal circumstances, but guess what, fully fueled jumbo jets intentionally plowing into the buildings at full speed was anything but normal. The buildings were fine, the blame rests with the terrorists.