Investigators continue to search for answers following the deadly Amtrak train derailment in Philadelphia.

FOX News Radio's Tonya J. Powers has the details: 

Cranes are working to get the overturned train cars upright again, as investigators with the National Transportation Safety Board try to determine why the crash happened.

(Sumwalt) "We'd like to at least reach out to the engineer, may be through his attorney to see if we could schedule an interview. I doubt we could actually do the interview today , but we at least want to make that contact. 

National Transportation Safety Board member Robert Sumwalt calls on a reporter for a question during a news conference near the scene of a deadly Amtrak train wreck, Wednesday, May 13, 2015, in Philadelphia. Sumwalt said Wednesday that the train was traveling at 106 mph when the engineer hit the brakes Tuesday night.  (AP Photo/Matt Slocum)
National Transportation Safety Board member Robert Sumwalt calls on a reporter for a question during a news conference near the scene of a deadly Amtrak train wreck, Wednesday, May 13, 2015, in Philadelphia. Sumwalt said Wednesday that the train was traveling at 106 mph when the engineer hit the brakes Tuesday night. (AP Photo/Matt Slocum)

NTSB board member Robert Sumwalt says they've got a long list of things to do.  

(Sumwalt) "We will watch the forward-facing video... We will do more analysis of the event recorder to figure out the speeds to develop a better timeline."

The train was going 106-miles-an-hour before it went off the rails in a curve where the speed limit drops to 50-miles-an-hour.

Tonya J. Powers, FOX News Radio. 

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