not reliable (this was before the invasion) were ignored. Tyler Drumheller who was at CIA, for example:
http://www.washingtonpost.com/wp-dyn/content/article/2006/06/24/AR2006062401081.html And just for another example, from article on the 2004 Senate Intel Committee report:
'The Dots Never Existed'
A damning report on Iraq intelligence failures throws the administration a Curve Ball
By Michael Isikoff
Newsweek
July 19 issue - The more he read, the more uneasy he became. In early February 2003 Colin Powell was putting the finishing touches on his speech to the United Nations spelling out the case for war in Iraq. Across the Potomac River, a Pentagon intelligence analyst going over the facts in the speech was alarmed at how shaky that case was. Powell's presentation relied heavily on the claims of one especially dubious Iraqi defector, dubbed "Curve Ball" inside the intel community. A self-proclaimed chemical engineer who was the brother of a top aide to Iraqi National Congress chief Ahmad Chalabi, Curve Ball had told the German intelligence service that Iraq had a fleet of seven mobile labs used to manufacture deadly biological weapons. But nobody inside the U.S. government had ever actually spoken to the informant—except the Pentagon analyst, who concluded the man was an alcoholic and utterly useless as a source. He recalled that Curve Ball had shown up for their only meeting nursing a "terrible hangover."
After reading Powell's speech, the analyst decided he had to speak up, according to a devastating report from the Senate intelligence committee, released last week, on intelligence failures leading up to the Iraq war. He wrote an urgent e-mail to a top CIA official warning that there were even questions about whether Curve Ball "was who he said he was." Could Powell really rely on such an informant as the "backbone" for the U.S. government's claims that Iraq had a continuing biological-weapons program? The CIA official quickly responded: "Let's keep in mind the fact that this war's going to happen regardless of what Curve Ball said or didn't say," he wrote. "The Powers That Be probably aren't terribly interested in whether Curve Ball knows what he's talking about."
http://www.msnbc.msn.com/id/5412317/site/newsweek