Why was the Amtrak train going twice the speed limit just prior to the crash? Update:Train not fitted with latest safety controls? Engineer resists giving statement to police?

Excessive speed appears to be a factor: Why was the train speeding?

FBI say no evidence of terrorism

They are still in rescue mode with this accident, given the nature of the wreckage and scale of the carnage. The obviously question remains that if excessive speed was the reason for the derailment, why was this train speeding?  

Wombat: Amtrak crash in Philadelphia, seven dead and over a hundred injured
Instapundit: Dems ready to roll out the infrastructure shibboleth will have to look elsewhere
Twitchy: Double the speed limit and Chris Cuomo shows his idiocy again

11 Things The Media Won't Tell You About Amtrak - Breitbart http://t.co/fpPfsKy469 via @BreitbartNews

— John Nolte (@NolteNC) May 13, 2015

Update:
Amtrak train not fitted with latest safety controls?  
Engineer resists giving statement to police?

"I blame lack of infrastructure spending." - Stuff I tell the cops when I crash my truck into the liquor store

— David Burge (@iowahawkblog) May 13, 2015

Instapundit: Why lefties hate Thomas the Tank Engine and everything you need to know about the Amtrak derailment
Why was the train speeding? Engineer has memory loss…
Rush Limbaugh: Democrats blame crash on Republicans