Atlanta highway collapse snarls traffic; fire investigated

ATLANTA — Atlanta's dreadful rush-hour traffic got even worse Friday, the morning after a raging fire underneath Interstate 85 collapsed an elevated portion of the highway and shut down the heavily traveled route through the heart of the city.Traffic was bumper to bumper on nearby streets as drivers were forced to take a detour. Many commuters in some of Atlanta's densely populated northern suburbs will probably have to find new routes or ride mass transit for weeks or even months.The blaz