What was the major part of 9/11

the twin towers being struck down by terrorists

When the plane hit the Tower and one fell on top of the other.

Explanation:

Hope this helps UwU

And heyo

a is the final : )

you can talk about what you learned about them. and you can talk about what happened on you're journeys with them. and then you can put all of the thing you learned about them in you're diary.