KGO ABC World News With Diane Sawyer December 3, 2013
What happened when the train hit the curve, the cars derailed and so many passengers were injured. There is new video tonight showing a closer look at the damage, the cars on their sides, the tracks mangled, and destroyed and giant cranes lifted the cars upright. The black boxes on board now offering more clues to this story. Abcs gio benitez goes in search of the answers. Reporter tonight abc news sources say human error is likely to blame for the train tragedy, investigators on the ground looking through the eery aftermath. Those tracks torn apart by a train traveling faster than its suppose...