I'm watching the pilot episode of "The Lone Gunmen" - in which Mulder & Scully's sidekicks uncover a plot by the government to stage an act of terrorism - to crash a commercial airliner into the World Trade Center... in order to cause an international panic and increase arms sales.
The episode was written in 2000 and aired in March 2001. Chris Carter must've been freaked out when it really happened 6 months later.
[youtube]http://www.youtube.com/watch?v=9rsMG2hHsLo[/youtube]