Or, as is far more logical the bottom part gets bigger as the upper part wears away.After all the lower part is almost ten times bigger than the upper part and is more strongly built.
MOMENTUM bill. DO YOU UNDERSTAND THE CONCEPT OF MOMENTUM? HOW BIG THE bottom part is has no effect on what the upper portion does to a single floor (and then the single floor after that, etc...).
If the WTC was 500 storeys tall, the same thing would have happened!!!!!
Oh my god, I know you are not that stupid, so why do you fail to realize and understand these basic concepts?