A factory worker who was suing his employer opened fire Thursday morning at an electrical equipment plant in North St. Louis, killing three co-workers before apparently taking his own life, St. Louis fire and police officials said. Five other people were injured. Armed with an assault rifle, a shotgun and a handgun, the man began his shooting spree in the parking lot and continued inside the ABB Power plant, officials said. . Four men were pronounced dead at the... (GunPolicy.org)