A loose signal wire caused the blackout that sent the cargo ship Dali crashing into Baltimore’s Francis Scott Key Bridge, the National Transportation Safety Board (NTSB) said Tuesday, blaming the Maryland Transportation Authority (MDTA) for failing to assess the bridge’s ability to withstand a ship strike.The collapse of the Francis Scott Key Bridge occurred early on March 26, 2024, when the container ship Dali lost power and struck a support pier, prompting the spans to fall into the Patapsco River.The NTSB’s final report found that a single misinstalled wire led to a total power loss that left the Dali without










