FILE - In this March 24, 2014 file photo, a Chicago Transit Authority train car rests on an escalator at the O'Hare International Airport station after it derailed in Chicago. More than 30 people were injured. A preliminary report released Monday, April 7, 2014, by the National Transportation Safety Board says there wasn’t enough distance between an automatic emergency braking mechanism and the end of a train track at Chicago’s O’Hare International Airport. (AP Photo/NBC Chicago, Kenneth Webster, File) MANDATORY CREDIT
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