Fiery Ohio derailment raises railroad safety questions

The fiery derailment of a train carrying toxic chemicals — sending a huge plume of smoke in the air and forcing residents of a small Ohio town to evacuate — has highlighted the potentially disastrous consequences of train accidents and raised questions about railroad safety. The railroad industry is generally regarded as the safest option for most goods and federal data show accidents involving hazardous materials are exceedingly rare. But with rails crossing through the heart of nearly every city and town nationwide, even one hazardous materials accident could be disastrous, especially in a populated area.