Couldn't be easier. George W. Bush, State of the Union Address, 2003:

With nuclear arms or a full arsenal of chemical and biological weapons, Saddam Hussein could resume his ambitions of conquest in the Middle East and create deadly havoc in that region.

And this Congress and the American people must recognize another threat. Evidence from intelligence sources, secret communications and statements by people now in custody reveal that Saddam Hussein aids and protects terrorists, including members of Al Qaida. Secretly, and without fingerprints, he could provide one of his hidden weapons to terrorists, or help them develop their own. Before September the 11th, many in the world believed that Saddam Hussein could be contained. But chemical agents, lethal viruses and shadowy terrorist networks are not easily contained.