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PHILADELPHIA, PA - MAY 13:  Investigators and first responders work near the wreckage of an Amtrak passenger train carrying more than 200 passengers from Washington, DC to New York that derailed late last night May 13, 2015 in north Philadelphia, Pennsylvania. At least five people were killed and more than 50 others were injured in the crash.  (Photo by Win McNamee/Getty Images)
PHILADELPHIA, PA - MAY 13:  Investigators and first responders work near the wreckage of an Amtrak passenger train carrying more than 200 passengers from Washington, DC to New York that derailed late last night May 13, 2015 in north Philadelphia, Pennsylvania. At least five people were killed and more than 50 others were injured in the crash.  (Photo by Win McNamee/Getty Images)

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The Amtrak train derailment was just one of several deadly train crashes in the past year. CNN's Suzanne Malveaux has more.

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The Amtrak train derailment was just one of several deadly train crashes in the past year. CNN's Suzanne Malveaux has more.