http://www.inthesetimes.com/site/main/a ... knew_0802/heres a big article. heres some high points
In his first major address on the “Iraqi threat†in October 2002, President Bush invoked fiery images of mushroom clouds and mayhem, saying, “Iraq is reconstituting its nuclear weapons program.â€
Yet, before that speech, the White House had intelligence calling this assertion into question. A 1997 report by the U.N.'s International Atomic Energy Agency (IAEA)—the agency whose purpose is to prevent nuclear proliferation—stated there was no indication Iraq ever achieved nuclear capability or had any physical capacity for producing weapons-grade nuclear material in the near future.
In February 2001, the CIA delivered a report to the White House that said: “We do not have any direct evidence that Iraq has used the period since Desert Fox to reconstitute its weapons of mass destruction programs.†The report was so definitive that Secretary of State Colin Powell said in a subsequent press conference, Saddam Hussein “has not developed any significant capability with respect to weapons of mass destruction
In the fall of 2002, the CIA told administration officials not to include this uranium assertion in presidential speeches. Specifically, the agency sent two memos to the White House and Tenet personally called top national security officials imploring them not to use the claim. While the warnings forced the White House to remove a uranium reference from an October 2002 presidential address, they did not stop the charge from being included in the 2003 State of the Union.
As the Washington Post later reported, Bush “ignored the fact that U.S. intelligence mistrusted the source†of the 45-minute claim and, therefore, omitted it from its intelligence estimates. And Bush ignored the fact that the Defense Intelligence Agency previously submitted a report to the administration finding “no reliable information†to prove Iraq was producing or stockpiling chemical weapons. According to Newsweek, the conclusion was similar to the findings of a 1998 government commission on WMD chaired by Rumsfeld.
Bush also neglected to point out that in early October 2002, the administration's top military experts told the White House they “sharply disputed the notion that Iraq's Unmanned Aerial Vehicles were being designed as attack weapons.†Specifically, the Air Force's National Air and Space Intelligence Center correctly showed the drones in question were too heavy to be used to deploy chemical/biological-weapons spray devices.
Regardless, the chemical/biological weapons claims from the administration continued to escalate. Powell told the United Nations on February 5, 2003, “There can be no doubt that Saddam Hussein has biological weapons and the capability to rapidly produce more, many more.†As proof, he cited aerial images of a supposed decontamination vehicle circling a suspected weapons site.
theres more, and the linked article has links to all of it.