CRONIN: ... ISIS - one of the reasons why it has the horrendous violence that it has is that they believe that the apocalypse is near. And if we have a large number of Western troops on the ground, that can feed right into their narrative.
CORNISH: So is that your issue - the idea that if there is a huge U.S. presence, Western troop presence, this plays into their hands and is a recruiting tool as well?
CRONIN: Exactly. And it's also very unlikely to solve the problem in the long run. What we're trying to do is truly destroy ISIS. We can set it back by using our remarkable military capabilities, but if what we really want to do is wipe it off the face of the earth - and how can we not given how emotionally upsetting all of these horrendous attacks have been - then we need to think more strategically rather than just act in a knee-jerk way.