I'd discuss whether or not terrorists are covered by the Geneva convention, but PT isn't the place to discuss a 4 hour class on the Law of Land Warfare that we get every year from the JAG.

To cut to the chase, the military's interpretation of the Law of Land warfare (AKA Geneva and Hague conventions) has been from the start that if you are on the battlefield, shooting at uniformed troops, and have neither a uniform nor a Geneva Convention ID, then you are not covered by the convention. In reality, they could be summarily be tried as spies and shot, but that wouldn't play well in the press.