We know for a fact that there were old chemical weapons munitions. The US military disposed of thousands of them. They were all pre Gulf War. What wasn't found were active chemical weapons labs.
"In all, American troops secretly reported finding roughly 5,000 chemical warheads, shells or aviation bombs, according to interviews with dozens of participants, Iraqi and American officials, and heavily redacted intelligence documents obtained under the Freedom of Information Act."
"According to the 10,000-word, eight-part interactive report ("The Secret Casualties of Iraq's Abandoned Chemical Weapons" [by the NY Times]) by C.J. Chivers published on the paper's website late Tuesday, at least 17 American service members and seven Iraqi police officers were exposed to nerve or mustard agents in Iraq after 2003."
"'Nothing of significance’ is what I was ordered to say,” Jarrod Lampier, a retired Army major, said of the 2006 discovery of 2,400 nerve-agent rockets at a former Republican Guard compound, the largest chemical weapons discovery of the war."
In short, it was propaganda that got us into that war, but it was also propaganda that got us out. The current common mythology around the Iraq war isn't any more accurate than the mythology that got us into it.
"In all, American troops secretly reported finding roughly 5,000 chemical warheads, shells or aviation bombs, according to interviews with dozens of participants, Iraqi and American officials, and heavily redacted intelligence documents obtained under the Freedom of Information Act."
http://www.nytimes.com/interactive/2014/10/14/world/middleea...
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"According to the 10,000-word, eight-part interactive report ("The Secret Casualties of Iraq's Abandoned Chemical Weapons" [by the NY Times]) by C.J. Chivers published on the paper's website late Tuesday, at least 17 American service members and seven Iraqi police officers were exposed to nerve or mustard agents in Iraq after 2003."
"'Nothing of significance’ is what I was ordered to say,” Jarrod Lampier, a retired Army major, said of the 2006 discovery of 2,400 nerve-agent rockets at a former Republican Guard compound, the largest chemical weapons discovery of the war."
https://www.yahoo.com/news/chemical-weapons-found-in-iraq-ny...