Sorry, but it's well documented:
A review of thousands of declassified government documents and interviews with former policymakers shows that U.S. intelligence and logistical support played a crucial role in shoring up Iraqi defenses against the "human wave" attacks by suicidal Iranian troops. The administrations of Ronald Reagan and George H.W. Bush authorized the sale to Iraq of numerous items that had both military and civilian applications, including poisonous chemicals and deadly biological viruses, such as anthrax and bubonic plague.
The website where this is posted is a bit sketchy, but it's a "reprint" of a Washington Post article from 2002. A few more interesting excerpts:
According to a sworn court affidavit prepared by [Howard Teicher, a former National Security Council official, who worked on Iraqi policy during the Reagan administration] in 1995, the United States "actively supported the Iraqi war effort by supplying the Iraqis with billions of dollars of credits, by providing military intelligence and advice to the Iraqis, and by closely monitoring third country arms sales to Iraq to make sure Iraq had the military weaponry required." Teicher said in the affidavit that former CIA director William Casey used a Chilean company, Cardoen, to supply Iraq with cluster bombs that could be used to disrupt the Iranian human wave attacks. Teicher refuses to discuss the affidavit.
When United Nations weapons inspectors were allowed into Iraq after the 1991 Gulf War, they compiled long lists of chemicals, missile components, and computers from American suppliers, including such household names as Union Carbide and Honeywell, which were being used for military purposes.
A 1994 investigation by the Senate Banking Committee turned up dozens of biological agents shipped to Iraq during the mid-'80s under license from the Commerce Department, including various strains of anthrax, subsequently identified by the Pentagon as a key component of the Iraqi biological warfare program. The Commerce Department also approved the export of insecticides to Iraq, despite widespread suspicions that they were being used for chemical warfare.
I also remember watching a video of an instructor telling soldiers what to expect when they entered Iraq during the first Iraq war. He was showing them specific US weapons, identifying them as being sold to Iraq during the war with Iran.
We (or at least the US administration) screwed up by supporting Saddam. Rather than trying to admit it, or explain it away, we should be learning from it and stop supporting the "enemy of my enemy". A large part of our problem in the Middle East is because we have been siding with dictators when it was politically convenient.
The Middle East is never going to "like" us, due to our support of Israel. But, I'm fine with that, as long as they "respect" us. Unfortunately, the vacillating support of tinpot regimes by successive US administrations has undermined that.
And folks, that right there is exactly how we knew Sadaam Hussein had "weapons of mass destruction". No further evidence needed.
Where did they go when we couldn't find them?