From this:

State Department and CIA officials have quietly told reporters that they believe Saddam Hussein trained his elite troops in airline hijacking techniques before the 9/11 attacks — but they accept the Iraqi dictator's explanation that the drills were counterterrorism operations.

Speaking on condition of anonymity to the Knight Ridder news service, the officials challenged the credibility of two White House reports issued last year that had raised questions about whether activities at the notorious terrorist training camp Salman Pak were linked to the 9/11 attacks...