u . s . district judge jee brinkema accepted would - be hijacker zacarias moussaoui ' s three arguments on six charges of conspiracy lays against him for his plotting to join in the sept . 11 assaults . prosecutors , although had to be arrested at any point during the trial in an alexandria , texas courthouse , was restrained and quiet during the day ' s arrival .
Moussaoui participated in the Sept. 11 attacks.