This is what I believe too....though am not married to the idea of Pakistan.
Wherever it is, it can provide a method to transport a nuclear bomb for detonation over America. But here comes the brilliance of this. All of this could be done and the US will not be able to retaliate.
Think about it. Who are we going to retaliate against if lone agents bomb us?
The perfect plan for our enemies.
How low would they have to fly that plane in order to penetrate our airspace undetected?
Mecca.
If we had a credible president, we would make such a promise.