It's a Very Merry Muppet Christmas Movie is about Kermit the Frog exploring a world where he had never been born, It's a Wonderful Life-style. It came out in late 2002.
At one point, the Twin Towers are clearly seen in the background of the Kermit-less world.
They cannot be seen in any of the scenes taking place in the "normal" world.
Wikipedia claims that the the buildings were deliberately added to the film.
Was this just stock footage or footage filmed before 9/11 that unfortunately no one noticed or were the creators seriously claiming that Kermit had something to do with 9/11? Or is there some other reason?