September 11 is the 254th day of the year (255th in leap years) in the Gregorian calendar. There are 111 days remaining. In 2001 on this day, America was attacked by suicide hijakers from al-Qaeda, who flew 4 commercial jetliners into the World Trade Center, the Pentagon, and a field in Shanksville after the passengers and crew from United Airlines Flight 93 revolted on the 9/11 attacks, causing some scenes similar to the September 11 attacks to be deleted, except when Krusty Towers collasped in "Krusty Towers" or in "Just One Bite" with the gas scene.
- 1999: "Nature Pants" and "Opposite Day" premiered..
- 2010: "Yours, Mine, and Mine" and "Kracked Krabs" premiered.
- September 11 on Wikipedia