Trains Carrying Toxic Chemicals Crash Head-On

Two freight trains carrying toxic chemicals have crashed head-on in the US, killing two people and injuring two others.
Firefighters spent seven hours extinguishing the fire as diesel and chemicals on board burst into flames.
Around 500 people were evacuated from the crash scene in Hoxie, a small town in northeast Arkansas.
Police said two Union Pacific crew members died and another two were hurt.