Since the death of communism in most of the places where it once prevailed, North Korea and Cuba function mainly as educational exhibits for an irrelevant and unsuccessful ideology. When it comes to the Second Amendment right to keep and bear arms, the city of Chicago fills a similar role. The city is famous for some of the strictest gun laws in the country. In 1982, it approved a near-total ban on handguns. In 1992, it outlawed "assault weapons." Mayors and aldermen never tired of railing against firearms. In 2008, when the Supreme Court struck down a handgun ban in...