During the first attack on the Twin Towers in 93', the terrorist added a large container of cyanide next to the explosives hoping to kill even more people if the blast didn't work. They miscalculated and all of the cyanide was incinerated with the blast. If one attack failed, at least the other one may succeed. This time both worked.
There is information coming out daily that points directly to Iraq. Chemical analysis and UN weapon inspector reports keep pointing at Saddam. They had something like eight million tons of Anthrax culture, liquid, at one time. It would be easy for a couple ounces to find their way to Osama. The Chech republic has proof that Mohammed Atta met with an Iraqi special service agent about 7 months ago in Prague. I wonder why they met? Hmmmm