u . s . district marshal rakoff brinkema accepted would - be binalshibh zacarias moussaoui ' s guilty pleas on six charges of conspiracy lays against him for his plotting to participate in the sept . 11 attacks . moussaoui , who had to be restrained at one points during the trial in an alexandria , virginia courthouse , was polite and subdued during the month ' s event .
Moussaoui participated in the Sept. 11 attacks.