WASHINGTON, July 30 - A senior leader of Al Qaeda who was captured in Pakistan several months after the Sept. 11 terrorist attacks was the main source for intelligence, since discredited, that Iraq had provided training in chemical and biological weapons to members of the organization, according to American intelligence officials.
Intelligence officials say the detainee, Ibn al-Shaykh al-Libi, a member of Osama bin Laden's inner circle, recanted the claims sometime last year, but not before they had become the basis of statements by President Bush, Vice President Dick Cheney, Secretary of State Colin L. Powell and others about links between Iraq and Al Qaeda that involved poisons, gases and other illicit weapons.
Mr. Libi, who was captured in Pakistan in December 2001, is still being held by the Central Intelligence Agency at a secret interrogation center, and American officials say his now-recanted claims raise new questions about the value of the information obtained from such detainees.
...
Intelligence officials declined to say precisely when Mr. Libi changed his account, and they cautioned that they still did not know for sure which account was correct. They said they would not speculate as to whether he might have been seeking to deceive his interrogators or to please them by telling them what he thought they wanted to hear.
http://nytimes.com/2004/07/31/international/middleeast/31inte.html?hp