You are completely, 100%, intellectually dishonest.
Richard Reid's actions were not a terrorist attack? Are you inSANE? He had a f**king BOMB in his SHOE! That is a terrorist attack!
The Al Fuqra-connected and Islamic-inspired DC Snipers (one of which draws admiring pictures of bin Ladin from his jail cell is absolutely one of the forms of terrorist attacks meant to be thwarted by the Patriot Act. The Rand Corportation, a defense think-tank, specifically noted the possibility of sniper actions as terrorism in a report released briefly after September 11.
Here, I know: You need to refine your assertion more. May I suggest you change it (again) to read: 0 [zero] trrorists attacks by Al Qaeda itself and not including shoe bombs, provided the terrorist does not employ a rifle within the lower-48 continental United States since one year after the Patriot Act was signed by GW. Bush, unless something did happen after all.
That'll be a little easier to defend.