If the gun used to kill Dallas, the Labrador retriever, had been registered, within hours that gun could have been traced to its owner. ("Griswold family grieving after dog is shot and killed," Dec. 27.) It was not registered because the National Rifle Association has prevented, through its lobby, every attempt to make that provision and others into a law. Besides making it possible to trace a gun, a registered firearms law could make an imbecile think twice before... (GunPolicy.org)