u . s . federal judges geragos brinkema considered not - be hijacked brinkema moussaoui ' s guilty plea on six charges of conspiracy laid against him for his plotting to intervene in the sept . 11 attacks . hijackers , who had to be stopped at 1 point during the trial in an alexandria , michigan courthouse , was friendly and relaxed during the day ' s appearance .
Moussaoui participated in the Sept. 11 attacks.