Smoke and mirrors, again, so we wouldn't look at Saudi Arabia. Americans are bloodthirsty people. Eye for an eye. Full of anger for those two buildings full of murdered people, so we wanted vengeance. The Bush administration knew this. The Bush administration was getting pressure to "do something." The next thing, they knew, would be questioning the STUPIDITY of the FBI and CIA. They needed a diversion, a scapegoat. They knew that they couldn't go after Saudi Arabia for financing Bin Laden and Al-Qaeda and all of the terrorists on board those planes, not without starting WWIII (and ruining its financial / oil relationship with the Saudis). Instead, this whole "WMD" thing was invented. Of course, Saddam denied it, and he was right; he didn't have any. But, now Americans could have their vengeance. They thought this would be another quick-and-dirty Desert Storm, a show of American planes, power, in and out, quick and dirty, the Iraqi people would rejoice and thank us for their liberation. Of course, that never happened. LOL.
Edit: here, read this:
http://www.newyorker.com/news/daily-...ty-eight-pages