You might want to read this.
"Powell said the "most dramatic'' of his allegations -- that Saddam Hussein's regime had mobile germ labs -- was based on questionable U.S. intelligence"
"Now it appears not to be the case that it was solid,'' he said.
http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2004/04/03/MNGJO609KQ1.DTL