An operator of a Chicago public-transit train that jumped the tracks and scaled an escalator at one of nation's busiest airports Monday may have dozed off, a union official said.
The woman said she had worked extensive overtime recently and was "extremely tired" at the time of the accident, Amalgamated Transit Union Local 308 President Robert Kelly told a news conference.
The derailment happened just before 3 a.m. Monday at the end of the Chicago Transit Authority's Blue Line at O'Hare International Airport. The timing of the accident helped avoid an enormous disaster, as the underground Blue Line station is usually packed with travelers. More than 30 people were hurt, but none had life-threatening injuries. (AP)