Lurking behind the Supreme Court's ruling last week that the Second Amendment protects an individual right to bear arms were a series of fascinating, disputed and now in many ways irrelevant questions. Do gun control laws reduce crime? Do they save lives? Is it possible they even cost lives? Justice Stephen G. Breyer, one of the dissenters in the 5-to-4 decision, surveyed a quite substantial body of empirical research on whether gun control laws do any good. Then he... (GunPolicy.org)