The National Transportation Safety Board recently opened the accident docket for its ongoing investigation into a March 24, 2014, accident involving a Chicago Transit Authority passenger train. At 2:49 a.m. the train failed to stop and went up an escalator at the end of the track used by the public to enter Chicago O’Hare International Airport. According to the Human Group Chairman’s Factual Report, the rapid transit operator admitted falling asleep before the incident. “I became sleepy and I nodded off into the terminal at O’Hare,” she tnew investigators. The NTSB report on the accident, including analysis and determination of probable cause, will be released at a later date.