Brit and U.S. spooks also differ on the credibility of the German informant “Curve Ball,” who claimed Saddam had built a fleet of mobile factories to produce germ-warfare agents. U.S. officials say the CIA lost confidence in the informer–and CIA assertions that two trailers found after the war were mobile biowarfare plants have been discounted. The “privy counsellors” said U.K. intel still thinks the trailers “could be used” for biowarfare production.