Liam Canavan, 19, never got to meet his uncle Sean, who would have become his godfather if he hadn't been working a carpentry job on Sept. 11, 2001, renovating office space on the 98th floor of the World Trade Center's South Tower.

But this week, Liam came to Guantanamo Bay to see the five men accused of plotting the terror attacks for himself -- watching trial proceedings from behind triple-paned glass in the courtroom's public gallery.

"It's emotional. It's hard to believe that they're there. I think -- and I'm guilty of this -- but a lot of people don't really know that the trial is going the way that it is. I wasn't even sure who most of those men were until a few weeks ago, when we were planning to come down here," Canavan said during an interview Saturday morning. "And once you really start to learn about the evil that they've committed, seeing them is just pretty terrible."