I guess your right. We can however rule out WMD's.
Actually, now that I think of it the reasons for attacking Iraq are outlined in the PNAC.
The WMD thing was to manufacture concent.
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"Indeed, the United States has for decades sought to play a more permanent role in Gulf regional security. While the unresolved conflict with Iraq provides the immediate justification, the need for a substantial American force presence in the Gulf transcends the issue of the regime of Saddam Hussein."
-Project for the New American Century (PNAC), Rebuilding America's Defenses, page 14
http://www.sundayherald.com/27735
A SECRET blueprint for US global domination reveals that President Bush and his cabinet were planning a premeditated attack on Iraq to secure 'regime change' even before he took power in January 2001.
The blueprint, uncovered by the Sunday Herald, for the creation of a 'global Pax Americana' was drawn up for Dick Cheney (now vice- president), Donald Rumsfeld (defence secretary), Paul Wolfowitz (Rumsfeld's deputy), George W Bush's younger brother Jeb and Lewis Libby (Cheney's chief of staff). The document, entitled Rebuilding America's Defences: Strategies, Forces And Resources For A New Century, was written in September 2000 by the neo-conservative think-tank Project for the New American Century (PNAC).