A contagious rage has seemingly possessed America in recent days. The common denominators — guns in the hands of angry and irrational people — have been the same whether the scene is a nursing home or a community English class for immigrants. And, on Saturday morning, in a city that prides itself on its decency, friendliness and common sense, the madness came home. The deadly ambush of three Pittsburgh police officers in Stanton Heights was more than a tragedy for... (GunPolicy.org)