APTOPIX Amtrak Crash

A flat bed truck hauls a section of new railroad track to the site of Tuesday's deadly train derailment, Thursday, May 14, 2015, in Philadelphia. At least seven people are dead and more than 200 people aboard injured, when the New York City bound Amtrak train derailed. Federal investigators have determined that the train was barreling through the city at 106 mph before it ran off the rails along a sharp curve where the speed limit drops to just 50 mph. (AP Photo/Mel Evans)