The congressional investigation is one thing, the independent commission's investigation is another. The commission's leaders have compained of footdragging by federal departments. meanwhile, the Bush adminstration has been fighting for months to block, delete or reclassify embarrassing portions of the 800 page report of the congressional investigation, a report which clearly shows, as your linked article notes, that key members of the Bush administration received specific warnings about impending terror attacks, including the use of hijacked aircraft, in the months before Black Tuesday.

The 10 members of the independent National Commission on Terrorist Attacks and its staff have had the report for several months and are using it in their more wide-ranging investigation.

The congressional investigation focused on intelligence before and after Sept. 11, while the independent commission's broad mandate includes immigration, airline safety and congressional oversight of counterterrorism.

The commission's two leaders, Tom Kean and Lee Hamilton, complained this week that federal departments were slow in turning over documents needed for their investigation.