Missouri train derailment

Foam that was used to extinguish a fire following a massive train collision and derailment is seen in Rockview, Mo., May 25, 2013.

A massive train collision and derailment caused a highway overpass to collapse in Rockview, Mo., May 25, 2013.

A Union Pacific rail car carrying some Chevy Silverados is seen after a massive train collision and derailment in Rockview, Mo., May 25, 2013.

Foam that was used to extinguish a fire following a massive train collision and derailment is seen in Rockview, Mo., May 25, 2013.

A massive train collision and derailment caused a highway overpass to collapse in Rockview, Mo., May 25, 2013.

Two vehicles were on the overpass when it collapsed in Rockview, Mo., May 25, 2013. Three people in one vehicle and two people in another vehicle were taken to a nearby hospital.

A massive train collision and derailment caused a highway overpass to collapse in Rockview, Mo., May 25, 2013.