Ok, if we're going down that route........a group of Saudi funded, mainly Saudi nationals who apparently were Al Qaeda terrorists attacked America. The US response, which we assisted with, was to then attack and invade Afghanistan and Pakistan to try and defeat the Taliban, another "terrorist"...
And there we have identified the problem. It's very difficult to have a "coherent strategy" on lone wolf or small terror cell attacks. The whole War on Terror was a ridiculous attempt in the first place and inflamed the situation. I'm not suggesting we do nothing, I'm just highlighting that...