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What buildings in NYC were also involved... you are the first to tell me there were more...

All eight of them, actually. WTC 1 through 8. Leveled to the ground. When I heard this last year I went to verify and Wikipedia actually shows a diagram of the complex. I forget which 9/11 related entry it was, but I Googled "how many World Trade Center buildings were destroyed."

That is indeed unknown to me, were the other 5 brought down later, after the attack