Investigators say faulty wiring and two blackouts led the ship’s pilots to lose control of propulsion and steering.

By Erin Hale and News Agencies

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A single loose wire on the Dali, a 300-metre (984ft) container ship, was responsible for the deadly collapse of the Francis Scott Key Bridge in Baltimore last year, according to a months-long investigation by the United States National Transportation Safety Board (NTSB).