“Proof that 9/11 wasn’t a government plot: It worked”

Jokes about the September 11, 2001 terrorist attacks on New York City’s World Trade Center are numerous, although not always politically correct. One 9/11 joke was posted on Reddit—Jokes on April 5, 2018:
 
Q: How do we know 9/11 wasn’t a government plot?
A: Because it worked.
 
A similar joke was posted on Reddit—Jokes on April 22, 2018:
 
“Proof that 9/11 wasn’t a government plot: It worked.”
     
       
Wikipedia: World Trade Center (1973-2001)
The World Trade Center was a large complex of seven buildings in Lower Manhattan, New York City, United States. It featured landmark twin towers, which opened on April 4, 1973, and were destroyed in the September 11 attacks, with 7 World Trade Center collapsing later that day due to the damage it suffered when the twin towers collapsed that morning. The other buildings in the complex were severely damaged by the collapse of the twin towers, and their ruins were eventually demolished.
 
At the time of their completion, the “Twin Towers” — the original 1 World Trade Center, at 1,368 feet (417 m); and 2 World Trade Center, at 1,362 feet (415 m) — were the tallest buildings in the world.
     
Reddit—Jokes
How do we know 9/11 wasn’t a government plot?
submitted April 5, 2018 by lickerishsnaps
Because it worked.
 
Reddit—Jokes
Proof that 9/11 wasn’t a government plot:
submitted April 22, 2018 by trampabroad
It worked.
 
Twitter
Joke Mug
@JokeMug
Proof that 9/11 wasn’t a government plot: It worked.
3:33 PM - 22 Apr 2018
 
Twitter
Lame Jokes
@lamejokes_net
Proof that 9/11 wasn’t a government plot: https://ift.tt/2qRyQyK
It worked.
#jokes
8:31 PM - 22 Apr 2018
 
Twitter
Brata George
@BrataGeorge
Proof that 9/11 wasn’t a government plot: It worked. #smile #reddit #jokes
8:34 PM - 22 Apr 2018