Joe Brower says everyday life is like "Wild Kingdom." It's survival of the fittest. And in his world, criminals don't attack people with guns; people with guns are the strong ones. If some criminal mistakes him for prey, as of today, a new law gives him the right to shoot with the gun he keeps at his side. "A lion out in Africa doesn't go for the strongest zebra," said Brower, a 44-year-old software engineer. "It goes for the weakest. Human predators do the exact same thing. If you are armed, that makes you stronger." The "Stand Your Ground" law...