Train collision: The Greek flag is at half-mast at the Parliament & Ministry of Foreign Affairs
The government declared a three-day national mourning, due to the deadly train accident in Tempi
Train collision: Chilling videos shortly after the head-on collision (videos)
Shocking video of passengers minutes after trains collided in Tempe - They run from mangled carriages as the trains burst into flames
How dangerous was the Ohio chemical train derailment? An environmental engineer assesses the long-term risks
The slow release of information after the derailment has left many questions unanswered about the risks and longer-term impact
