Citing AdamG in part:
Monday’s deadly Amtrak train derailment appears to have been caused by an object on the railway, according to a government official briefed on the crash.
A preliminary investigation suggests maintenance problems are unlikely to blame because the incident took place on brand-new tracks, the official told The Associated Press on condition of anonymity.
At least six people were killed and the death toll is expected to rise, the official said.
Or it was speeding at 81 mph onto a curve with a 30mph limit. Luckily on the inaugural journey very few passengers were aboard.
Link:http://www.bbc.co.uk/news/world-us-canada-42408624