i think he should be excecuted publicly, on the site of the twin towers collapse.
but if prison is the only way to go, i would put him in solitary, with a closed circuit camera, and start a pay per view channel so people could pay to watch him rot.
or....each day, you could let people pay to go into his cell and throw things at him.
then give the money from the PPV to the families of those who have lost loved ones either on 911 or in Afghanistan or Iraq.