At the Central Intelligence Agency, officials embraced Curveball's account even though they could not confirm it or interview him until a year after the invasion. They ignored multiple warnings about his reliability before the war, punished in-house critics who provided proof that he had lied and refused to admit error until May 2004, 14 months after the invasion.

After the CIA vouched for Curveball's accounts, Bush declared in his 2003 State of the Union speech that Iraq had "mobile biological weapons labs" designed to produce "germ warfare agents." Bush cited the mobile germ factories in at least four prewar speeches and statements, and other world leaders repeated the charge.

Powell also highlighted Curveball's "eyewitness" account when he warned the United Nations Security Council on the eve of war that Iraq's mobile labs could brew enough weapons-grade microbes "in a single month to kill thousands upon thousands of people."

The senior BND officer who supervised Curveball's case said he was aghast when he watched Powell misstate Curveball's claims as a justification for war.

"We were shocked," the official said. "Mein Gott! We had always told them it was not proven…. It was not hard intelligence."