On a side note, Osama Bin Laden declined any responsability for 9/11, and no evidence has been found linking the events to him.
It's not the type of guy to decline responsability for his actions, unlike George Walker B.
Bin Laden is a wanted fugitive for terrorist bombings in 1998 in Africa.
http://www.fbi.gov/wanted/topten/fugitives/laden.htm