Every once in a while, a dramatic news story can actually produce real reform. More often the momentum peters out once the story disappears from the news (remember how Sandy Hook meant we were going to get real gun control?), but it can happen. And now, after the aftermath of the killing of Michael Brown in Ferguson, Missiouri, turned to a chaotic nightmare of police oppression, we may have an opportunity to examine, and hopefully reverse, a troubling policy trend of recent years. The focus has now largely turned from an old familiar story (cops kill unarmed black kid) to a relatively unfamiliar one, about the militarization of the police. The images of officers dressed up like RoboCop, driving around in armored assault vehicles, positioning snipers to aim rifles at protesters, and firing tear gas and rubber bullets at Americans standing with their hands up saying "Don't shoot!" has lots of Americans asking how things got this way. This issue offers the rarest of all things, an...