Dorgan also cited an in-depth study of the bridge's fatigue potential conducted from 2004 to 2007 that recommended two alternatives for the bridge's future -- to add steel plates to reinforce critical parts of the bridge or to conduct thorough inspections of the wells inside the box to determine whether there were cracks.

CNN: Bridge collapse probe focuses on unexplained shift

How smart is Dagny and Ellis for not testing the steel themselves but they bravely ride a high speed train over a bridge made of it?

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