An assessment after last year's deadly accident found the Baltimore bridge's vulnerability was almost 30 times greater than the risk threshold, the NTSB said.

The NTSB says the collapse of the Francis Scott Key Bridge in Baltimore could have been prevented with "vulnerability assessments" by the Maryland Transportation Authority.

The Maryland Transportation Authority failed to complete a recommended vulnerability assessment that would have shown the Francis Scott Key Bridge was at significant risk of collapse from a ship strike long before its demise last year,