Government severely misjudged strength of Oroville emergency spillway, sparking a crisis

Chicago train

Authorities inspect the wreckage of two Chicago Transit Authority trains that crashed Monday, Sept. 30, 2013, in Forest Park, Ill. The crash happened when a westbound train stopped at the CTA Blue Line Harlem station and was struck by an eastbound train on the same track.
M. Spencer Green / Associated Press
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