Take the lone gunman - there is a huge amount of TV material out there and a lot of it is based around spy/war scenarios. Planes had been a target for terrorists for decades before 9/11 and the World Trade Centre had already been attacked by terrorists once before. Plus it seems like 50% of all dramas are based in New York. The writer look for the most spectacular thing a terrorist could do with a plane for their plot line, terrorists were looking for the most spectacular thing they could do with a plane to strike at America. It's not much of a surprise that one of the TV plots was similar to one of the TV plots (aside from the differences that even the cherry picking editing couldn't avoid, like the attack occurring at night, the attack being foiled, a remote controlled plane rather than a hijacking). The US was aware of Al Quaeda's interest in using jetliners as weapons before the attack and that suggestion would almost certainly have been in articles read by the writers researching the show.
If a nuke goes off in the US at some point does that mean 24 predicted it? Or just that the writers of the series were specifically looking for something believable, something that terrorists would actually try to do?
How about humans are just violent, and would predictably script violent things? Give people long enough time, and I'm sure there will be some horrible, bloody massacre that can be obscurely related to just about every show/movie ever.
@0ddity's post: Sweet jebus that's a lot of crazy per cubic inch.
So all of the dates are correct. Whether any of the items are because of knowledge of the events prior to them happening or not nobody knows, but I'm sure they didn't. I'm not going to believe the Matt Groening, because he knew, chose to make $9 bus tickets, put it next to the WTC and go "I hope they get the message about 9/11!"