No matter what you believe happened or who was responsible for 9/11, a tragedy is the best way to describe this event.
I could go on a long winded 9/11 Truth type rant here but I honestly don't have the energy for that right now. So while I'll spare you the conspiracy theory lecture, I'll end with this:
If there is a hell, I hope Dick Cheney enjoys his stay there when his pacemaker finally gives out. You got your "new Pearl Harbor" you bastard.