As Zacarias Moussaoui (zak-uh-REE'-uhs moo-SOW'-ee) prepares to plead guilty today in the Nine-Eleven attacks, his role in the 2001 assault remains in dispute.
Moussaoui was behind bars in Minnesota the day of the attack, having been arrested a month earlier for overstaying his visa, after employees of a Minneapolis flight school became suspicious of him.
He's charged with six counts of conspiracy and while he admits membership in al-Qaida, Moussaoui has denied involvement in the Nine-Eleven plot.
Once he appears today in federal court in Alexandria, Virginia, Moussaoui still could change his mind, which he did once before. He has fought with and insulted the judge, his own lawyers and prosecutors but also has had some surprising legal victories.
Several lawyers say Moussaoui's decision only underscores questions about his competence.
Federal prosecutors plan to pursue the death penalty.