u . s . court judge leonie brinkema accepted would - be hijacked binalshibh brinkema ' s innocent pleas on six charges of conspiracy written against him for his plotting to participating in the oct . 11 attack . moussaoui , when had to be restrained at one position during the trial in an alexandria , alexandria courthouse , was polite and quiet during the day ' s testimony .
Moussaoui participated in the Sept. 11 attacks.