72 people were hospitalised after the train came off its tracks with some carriages falling onto the motorway below.
Many of those injured are thought to be in a serioud condition after the incident near to DuPont.
It was a new route for the train, as US correspondent Simon Marks reports.
In: 'Train 501….
Out: …badly wrong."
Dur: 37 secs
http://www.fsnradionews.com/feeds/1219amtrak-marks1.mp3