Zacarias Moussaoui
PER
Zacarias Moussaoui Moussaoui
The sentencing trial of Zacarias Moussaoui was supposed to have been the government's best opportunity to hold someone accountable for the deaths on Sept. 11, 2001. But after federal prosecutors finished laying out their case this week, even those who strongly supported an aggressive prosecution may wonder whether the trial has shed as much light on Mr. Moussaoui's culpability as it has on the missteps and mistakes by law enforcement agencies. Mr. Moussaoui is the sole person to go to trial in an American courtroom for the attacks, making him a proxy for the 19 hijackers who were killed carrying out the attacks and the chief planners who are being held in secret C.I.A. prisons overseas.