to comment specifically on al-Libi's case as much of the information remains classified; however, current and former government officials agreed to discuss the case on condition of anonymity. Two U.S. counter-terrorism officials told Newsweek that they believe the information that Powell cited about al-Iraqi came exclusively from al-Libi. A CIA officer told the United States Senate Select Committee on Intelligence that while the CIA believes al-Libi fabricated information, the CIA cannot determine whether, or what portions of, the original statements or the later recants are true of false. The Senate report concluded that "The Intelligence Community has found no postwar information to indicate that Iraq provided CBW training to al-Qa'ida." (For more information, see Saddam Hussein and al-Qaeda timeline for 1995 and December 2005). Official investigations and reports Several official investigations by U.S. intelligence agencies, foreign intelligence agencies, and independent investigative bodies have looked into various aspects of the alleged links between Saddam Hussein and al-Qaeda. Every single investigation has resulted in the conclusion that the data examined did not provide compelling evidence of a cooperative relationship between the two entities. 1993 WTC investigations After the attack on the World Trade Center in 1993, there were several investigations of possible collaboration between Saddam Hussein and the terrorists who attacked the building. Neil Herman, who headed the FBI investigation into the attack, noted that despite Yasin's presence in Baghdad, there was no evidence of Iraqi support for the attack. "We looked at that rather extensively," he told CNN terrorism expert Peter Bergen. "There were no ties to the Iraqi government." Bergen writes, "In sum, by the mid-'90s, the Joint Terrorism Task Force in New York, the F.B.I., the U.S. Attorney's office in the Southern District of New York, the C.I.A., the N.S.C., and the State Department had all found no evidence implicating the Iraqi government in the first Trade Center attack." 1998 National Security Council exercise In 1998, Daniel Benjamin, who headed the National Security Council's counterterrorism division, led an exercise aimed at a critical analysis of the CIA's contention that Iraq and al Qaeda would not team up. "This was a red-team effort," he said. "We looked at this as an opportunity to disprove the conventional wisdom, and basically we came to the conclusion that the CIA had this one right." Benjamin later told Boston Globe reporters, "No one disputes that there have been contacts over the years. In that