The U.S. government is accused of withholding knowledge about chemical weapons inside Iraq.
In one of the bitterest ironies of the Iraq War, a New York Times investigationfound American soldiers suffered injuries after being exposed to chemical weapons discovered in Iraq.
The chemical weapons are not ones the U.S. went to war over, but old, discarded weapons manufactured during the 1980s with help from western countries, including the U.S., who were aiding Iraq in its war against Iran, CBS News correspondent David Martin reports.