Mortar shells found in southern Iraq by the Danish military do not appear to contain chemical weapon agents as originally suspected, Fox News has learned.
http://www.foxnews.com/story/0,2933,108390,00.html
Since the war ended, the U.S.-led coalition has found several caches that tested positive for mustard gas but later turned out to contain missile fuel or other chemicals.
Other discoveries early in the U.S.-led occupation turned out to be old caches that already had been tagged by U.N. inspectors and were scheduled for destruction.