Second Amendment: Chicago is deciding whether to prosecute a great-grandfather and Korean War veteran under its handgun ban. He refused to be a victim, and now there's one less armed thug roaming the streets. What's the problem? If the 80-year-old vet living on the city's West Side didn't have the gun the city said he shouldn't have, he and his 83-year-old wife and 12-year-old great-grandson might have joined those victims of gun violence about whom gun-control advocates constantly chirp. The vet obtained the gun in violation of the city's handgun ban after a prior incident in which the couple was...