The CIA's top leaders failed to use their available powers, never developed a comprehensive plan to stop al-Qaida and missed crucial opportunities to thwart two hijackers in the run-up to Sept. 11, the agency's own watchdog concluded in a bruising report released Tuesday. Completed in June 2005 and kept classified until now, the 19-page executive summary finds extensive fault with the actions of senior CIA leaders and others beneath them. "The agency did not always work effectively and cooperatively." The executive summary says U.S. spy agencies, which were overseen by Tenet, lacked a comprehensive strategic plan to counter Osama bin...