Contrary to what most people may think, the FBI and CIA are not hunting for Osama Bin Laden, they don't even list him as part of the 9/11 perpetrators. In fact the only reason he was on the FBI's most wanted page is due to his involvement with embassy bombings in Dar es Salaam, Tanzania, and Nairobi, Kenya, and while these crimes are terrible in their own right, they aren't on the same scale as 9/11 was. This leaves one to wonder if Osama was involved at all, after all he lives in a cave, is sickly and on dialysis and has relatively friendly ties with certain rich American families.
Curiously, the Justice Department has decided NOT to indict Bin Laden for 9/11 despite the administration's early assurance that he did in fact command the attack.
Makes one wonder if the official story is true at all.
Further Reading: Washington Post