The 9/11 and the Spanish flu are kind of similar.
The Spanish flu was a very dangerous flu, and in 9/11, something very dangerous flew.
I hate jokes about 9/11... every joke has the tendency to crash and burn.
"I didn't get the joke at first, but then it hit me like a plane," the joke was so dark a cop almost shot it.
What was the favorite game in 2001? Flight simulator.
Fall
I want to tell you a joke about 9/11... but I'm afraid it will be the bomb.
Why is the Leaning Tower of Pisa leaning? Because it had better reflexes than the Twin Towers.
Me: Bro, I don't think the Twin Towers will ever order pizza again.
Friend: Why?
Me: Because when they ordered pepperoni, all they got was plane.
Titanic, doing the polar plunge before it was cool.