"Even though such contributions were indeed unverifiable--particularly the one that required Binalshibh to read bin Laden's mind--the 9/11 Commission came to rely on this information, giving it the benefit of the doubt when conflicting information surfaced. For instance, the commission uncovered CIA documents that threatened to complicate matters by dragging Iran into the 9/11 conspiracy: The documents revealed that Iran had "apparently facilitated" the travel of most of the 9/11 "muscle hijackers" in flights from Afghanistan by not stamping their passports, and that Imad Mugniyar, the Hezbollah terrorist group's infamous chief of terrorist operations, had flown with the hijackers. But the commissioners merely referred the "troubling" matter to the CIA project manager.

At that point, the report was only one week away from publication. The project manager quickly ran the information past the agency's prisoners [ What possible reason could there be not to trust AQ prisoners after all? -ed. ] and sent a reply back "just in time for inclusion in the Report," Messrs. Kean and Hamilton write. Result: "We found no evidence that Iran or Hezbollah was aware of the planning for what later became the 9/11 attack." Such CIA feeds permitted the commission to hew to its theory that al Qaeda carried out 9/11 with no help from any outside party or government. [ How could it possibly be otherwise? -ed. ]

With this book, Messrs. Kean and Hamilton have shown how a government-appointed commission managed to create the appearance, if not the reality, of an exhaustive independent investigation and artfully transformed itself into a lobby for the reorganization of the intelligence establishment. Now that is without precedent."