Not long after Operation Avarice had secured its 400th rocket, in 2006, American troops were exposed several times to other chemical weapons. Many of these veterans said that they had not been warned by their units about the risks posed by the chemical weapons and that their medical care and follow-up were substandard, in part because military doctors seemed unaware that chemical munitions remained in Iraq.
In some cases, victims of exposure said, officers forbade them to discuss what had occurred. The Pentagon now says hundreds of other veterans reported on health-screening forms that they believed they too had been exposed during the war.
Aaron Stein, an associate fellow at the Royal United Services Institute, said the belated acknowledgment of a chemical-rocket purchases, as well as the potentially worrisome laboratory analysis of the related sarin samples, raised questions about the militarys commitment to the well-being of those it sent to war.
http://www.nytimes.com/interactive/2014/10/14/world/middleeast/us-casualties-of-iraq-chemical-weapons.html?action=click&contentCollection=Middle%20East&module=RelatedCoverage®ion=Marginalia&pgtype=article
The secrecy fit a pattern. Since the outset of the war, the scale of the United States encounters with chemical weapons in Iraq was neither publicly shared nor widely circulated within the military. These encounters carry worrisome implications now that the Islamic State, a Qaeda splinter group, controls much of the territory where the weapons were found.
The American government withheld word about its discoveries even from troops it sent into harms way and from military doctors. The governments secrecy, victims and participants said, prevented troops in some of the wars most dangerous jobs from receiving proper medical care and official recognition of their wounds.
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.
http://www.nytimes.com/interactive/2014/10/14/world/middleeast/us-casualties-of-iraq-chemical-weapons.html?action=click&contentCollection=Middle%20East&module=RelatedCoverage®ion=Marginalia&pgtype=article
American Firms Supplying Iraq's Chemical Weapons Production
http://www.nytimes.com/interactive/2014/10/14/world/middleeast/american-firms-supplying-iraqs-chemical-weapons-production.html