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A crane removes a pickup truck from the wreckage of the Interstate 5 bridge over the Skagit River in Mount Vernon, Wash. Metal fatigue is evident in a steel truss bridge over Interstate 5 in Washington state, south of this similar steel truss that collapsed May 23, 2013.

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Review: Systematic errors led to Washington bridge collapse

OLYMPIA, Wash. — Insufficient route planning, a distracted pilot driver and an inadequate permitting process by the state of Washington all played a part in last year’s Interstate 5 bridge collapse north of Seattle, which sent two cars into a river below, the National Transportation Safety Board said Tuesday.

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