What did the planes say when they were smashing or passing the Twin Towers?
Smash.
(Get it?) 9/11.
When the South Tower saw the North Tower collapse, he said, "I'm still standing."
The Twin Towers ordered a pepperoni pizza. They got plane.
Your hairline [is] so bad it went down like the Twin Towers.
Why couldn't people have their phone on airplane mode during 9/11?
Because their phone exploded the towers.
What's another name for 9/11?
A forbidden game of Jenga.
"I’m coming for you two!"
The Twin Towers ordered 3 tacos.
One was just a plane tortilla.
The other one was also just a plane tortilla.
And the third one went to the wrong address.
Q: Where do you bury the people killed in 9/11?
A: It's already done for you.
Why is the Tower of Pisa leaning?
Because unlike the Twin Towers it can dodge.