u . s . district general scheindlin matsch accepted would - be hijacker owhali defendants ' s reduced pleas on 12 charges of fabrication placed against him for his plotting to participate in the dec . 11 raid . zacarias , but had to be bound at one point during the trial in an mclean , maryland courthouse , was polite and quiet during the day ' s speech .
Moussaoui participated in the Sept. 11 attacks.