I need to update my figures a bit, but here goes
9/11 wasn't THAT big a deal in and of itself. Here's some interesting statistics. (Note, some of these figures were computed in september 2010, others Jan 2010.
The aircraft that were used in NYC, took off from Boston. Both cities were major supporters of the IRA. (that's just coincidence though)
In September 2001, more than 3,000 people died on US roads, as they had the month before, the month after, or indeed on average every month for the past 15 years.
You are 155x more likely to die on US roads, than in a terrorist incident anywhere in the world where US civilians were injured or killed, or US millitary 'outposts' were targetted, over the last 15 years.
You are 74x more likely to be murdered in the US, than be killed in a US targeting terrorist attack, over the last 15 years.
You are twice as likely to be killed by the weather in the US, than by a terrorist action targeting the US.
As of Jan 2010, the odds of being on a flight in the US that was involved in a terrorist action, was 10,000,000-1 over the previous 10 years. That's lottery jackpot odds.
So, while there has been millions and billions spent on 'anti-terrorism', the US National Weather Service has had it's funding cut; police forces have had their funding cut, while also being told to spend time 'hunting terrorists'; and absolutely nothing has been done to increase driver safety through training (coupled with reduced cops, again).
Hysteria, it gets people elected.