I don't think many people in the air force buy in to the 5 ring targeting theory. The systems Warden talks about are models we construct in our minds, they do not represent reality. It is an amateurish way to conduct a war and just like our COIn doctrine it hasn't received any gold medals. We won't put a dent in their multiple means of financing by targeting one source ineptly with these strikes. Targeting empty buildings is for theater. Killing members of IS is valuable as is destroying their vehicles. They should have been the first target before they disperse and become less vulnerable. We can blow up fixed targets like empty buildings later. Studies on the effectiveness of air campaigns indicate that hitting an adversaries armed forces have been considerably more effective than deep attacks on strategic targets. I think both have a role but in this case it needs to be the focus. The fielded forces are real, the systems are figment of our imagination used to make sense of complexity, but complexity is still there and these systems rapidly change and continue to function.