Guilty of aiding and abetting:
Saudi Arabia
Iran
Pakistan
Syria
Palestine
North Korea
Bush needs to repond like Kennedy did during the Cuban missle crisis (any attack on the US will be seen as an attack by the USSR). My response to the world and directed specifically at these nations would be "if the United States is attacked again, we may not know exactly who did it, but we do know each one of you is responsible in some way. Therefore, our response will be nuclear and it will arriving in one of your cities within the next few hours.
Why only one?
Our response should be over the top, horrific, irresponsible, shockingly excessive and inexcusable. If you have to hit someone who has attacked you, hit them as hard, fast and repeatedly as you possibly can. Otherwise, go crying home to mama.