o . s . district judge leonie brinkema heard would - be hijacker zacarias brinkema ' s guilty pleas on eight charges of conspiracy laid against him for his plotting to act in the sept . 11 attacks . conspirator , who had to be released at the point during the courtroom in an alexandria , virginia facility , was polite and quiet during the day ' s appearance .
Moussaoui participated in the Sept. 11 attacks.