"After he and his followers killed thousands? "
Are you speaking of Bin Laden?
WHERE'S THE PROOF?
To THIS day, there is NO PROOF who really plotted and was responsible for 9/11.
Bin Laden acknowledged the attacks, saying they were justified (or something like that), but claims he never had anything to do with it.
Actually, the White House has been blocking any official investigation into 9/11, stonewalling and blocking attempts to get to the bottom of this.
They're covering their dreary asses, that's why.
Now why do you think THAT is??