"The FBI has insisted it had no advance warning about the 9-11 attacks. But internal documents suggest there were more concerns inside the bureau's field offices than Washington has acknowledged.

The notes are especially eerie because Moussaoui faces charges that he was part of the 9-11 plot. Sources say the notes Mueller referred to were written in early September 2001-days before the attack. The author was part of a counterterrorism team desperately trying to figure out what Moussaoui was up to. He had been arrested in August on immigration charges after a Minnesota flight instructor reported that he showed a suspicious interest in learning how to steer large airliners."

"The military sent fighter jets to chase suspicious aircraft 462 times between Sept. 11 and June, nearly seven times as often as the 67 scrambles from the same period a year earlier. More frequent scrambles are also faster in the tense new environment because the North American Aerospace Defense Command communicates better with the Federal Aviation Administration."