This video, entitled "Mystery of the Urinal Deuce" is causing quite a stir in the 9/11 truth movement. I think I've seen as many posts tearing it down as ones giving it a thumbs up. Apparently the site 911truth.org got hit pretty hard with traffick, as one of the characters on the show was wearing a t-shirt with that written on it and was featured fairly prominently. I find it a bit odd that only five years after the crime that changed the world forever it is now acceptable to use as a punch-line, but it was bound to happen sooner or later. Watch it yourself and make your own deceision. For me, I'm still holding out and hoping some sort of real investigation might eventually happen.
South Park - The Complete Eighth Season