Of course, it's difficult to know for sure if that was the original plan or not. However the actions seem to be quite consistent with that strategy: Choosing Af

Of course, it's difficult to know for sure if that was the original plan or not. However the actions seem to be quite consistent with that strategy: Choosing Afghanistan (the grave of empires) as the base of operations, and the selection of targets in the attack looks like an attempt to enrage, not just to cause fear. Whatever the actual plan was, I do think it involved provoking US to attack Afghanistan.