JJM & Jonah, I think both aspects of this are right. The arrests component is very important — that is why AG Ashcroft, for example, made “spitting on the street” his way of saying “broken windows” as the new approach to national security threats after 9/11 — the concept that we were going to project not only the reality but the appearance of order, targeting (and thus discouraging) potential threats not just by terrorism charges but based on any crime, no matter how comparatively trivial, you could get them on. But the appearance of order is probably just as important. Buildings and streets that don’t look like no one cares about them tend to get treated as if everyone cares about them, so they’re less likely to be disturbed.