AVON -- Shocked drivers could do nothing as a runaway dump truck hurtled toward them down Avon Mountain and careened into cars and a bus during morning rush hour Friday. It left a path of death, of twisted metal, of vehicles in flames and of people crying and screaming. By nightfall, the death toll stood at four. Of the 30 people involved, 15 were injured, four critically. Investigators waited for hours as crews searched cars burned beyond recognition for more victims. The medical examiner's office in Farmington said it will not release identities until Monday. The tragedy started atop Avon...