U.S. District Judge Leonie Brinkema accepted would-be hijacker Zacarias Moussaoui's guilty pleas on six charges of conspiracy laid against him for his plotting to participate in the Sept. 11 attacks . Moussaoui, who had to be restrained at one point during the trial in an Alexandria, Virginia courthouse, was polite and quiet during the day's appearance.
Moussaoui participated in the Sept. 11 attacks.