The Able Danger intelligence, if confirmed, is undoubtedly the most relevant fact of the entire post-9/11 inquiry. Even the most junior investigator would immediately know that the name and photo ID of Atta in 2000 is precisely the kind of tactical intelligence the FBI has many times employed to prevent attacks. Yet the 9/11 Commission inexplicably concluded that it was not historically significant." This astounding conclusion -- in combination with the failure to investigate Able Danger and incorporate it into its findings -- raises serious challenges to the commission's credibility and, if the facts prove out, might just render the commission historically insignificant itself. The Able Danger team had identified Atta and three other 9/11 hijackers by mid-2000 but were prevented by military lawyers from giving this information to the FBI. The Pentagon...blocked several military officers from testifying...about the Able Danger program. The chairman of the 9/11 Commission reacted to Able Danger with the standard Washington PR approach. [He] demanded that the Pentagon conduct an "investigation" to evaluate the "credibility" of Col. Shaffer and Capt. Phillpott. The final 9/11 Commission report...concluded that "American intelligence agencies were unaware of Mr. Atta until the day of the attacks." This now looks to be embarrassingly wrong. The Joint Intelligence Committees should reconvene and, in addition to Able Danger team members, we should have the 9/11 commissioners appear as witnesses so the families can hear their explanation why this doesn't matter.