If they did, how did design flaws in the Twin Towers make them collapse?

Question by Mattyhehe: If they did, how did design flaws in the Twin Towers make them collapse?

Alternatively, what other theorys are there for the destruction? How would controlled demolition be possible?

Best answer:

Answer by Derek F
The main problem is that two passenger liners with jet fuel slammed into them

What do you think? Answer below!