Lots of readers have sent me the news that the worst school massacre was in fact a bombing in Bath, Michigan. Tom Tancredo and others are making a lot of this. The pro-second amendment guys say this shows that when a someone wants to be a mass murderer he’ll find a way, so guns aren’t the issue. Fair enough, to a point. But this doesn’t strike me as a great argument. Explosives are heavily regulated and even most gun control opponents are for bomb control, right?