Officials say all 7 cars of Amtrak train that derailed in Philadelphia came off the tracks - @AP
According to @NBCPhiladelphia, the junction of Tuesday night's train derailment in Philadelphia was the site of another train accident in 1943 that killed 79 people.
The speed limit in the section of track in Philadelphia where an Amtrak train derailed is 50 mph, per the Federal Railroad Administration. The Philadelphia Inquirer and the Wall Street Journal both report the train was traveling in excess of 100 mph.