DANGER

Toxic Train Derails, Catches Fire

As many as 5,000 people in Blount County, Tennessee, have been evacuated after a derailment and fire aboard a CSX train carrying Acrylonitrile, a flammable and poisonous chemical. Officials say at least 12 emergency responders are undergoing decontamination. There have been no reported fatalities so far, and the evacuation could last as long as 48 hours.