There were chemical weapons in Iraq and the Bush administration lied about them (I’m shocked!!):
Participants in the chemical weapons discoveries said the United States suppressed knowledge of finds for multiple reasons, including that the government bristled at further acknowledgment it had been wrong. “They needed something to say that after Sept. 11 Saddam used chemical rounds,” Mr. Lampier said. “And all of this was from the pre-1991 era.”
Others pointed to another embarrassment. In five of six incidents in which troops were wounded by chemical agents, the munitions appeared to have been designed in the United States, manufactured in Europe and filled in chemical agent production lines built in Iraq by Western companies.
Iraq had attacked Iran in late 1980, expecting quick victory against a military sapped of officers by Iran’s revolutionary purges. Mr. Hussein also thought Iranians might rise against their new religious leaders.
He miscalculated. By June 1981, as Iran blunted Iraq’s incursions and unleashed its air force against Iraqi cities, Mr. Hussein was seeking new weapons. He created a secret program — known as Project 922 — that produced blister and nerve agents by the hundreds of tons, according to Iraq’s confidential declarations in the 1990s to the United Nations.
War provided urgency; Mr. Hussein added the cash. Western nations, some eager to contain Iran’s Islamic revolutionary state after the American hostage crisis from 1979 to 1981, lent Iraq support.
With remarkable speed, Iraq built a program with equipment and precursor purchases from companies in an extraordinary array of countries, eventually including the United States, according to its confidential declarations.
German construction firms helped create a sprawling manufacturing complex in the desert south of Samarra and three plants in Falluja that made precursor ingredients for chemical weapons. The complex near Samarra, later renamed Al Muthanna State Establishment, included research labs, production lines, testing areas and storage bunkers.
Iraq produced 10 metric tons of mustard blister agent in 1981; by 1987 its production had grown 90-fold, with late-war output aided by two American companies that provided hundreds of tons of thiodiglycol, a mustard agent precursor. Production of nerve agents also took off.
Rising production created another need. Mr. Hussein’s military did not possess the munitions for dispersing chemical agents. So it embarked on another buying spree, purchasing empty ordnance — aviation bombs from a Spanish manufacturer, American-designed artillery shells from European companies, and Egyptian and Italian ground-to-ground rockets — to be filled in Iraq.
So while the US was backing Saddam Hussein and Iraq, Iraq had and used chemical weapons (with the US and allies helping); after the US broke with Iraq (dramatically with the first Iraq war) they mostly stopped making and using chemical weapons. Makes me proud to be an American.