A new report reveals that several Bay Area bridges have an “unknown level of risk” for collapse and should be evaluated.

A year after the collapse of the Francis Scott Key Bridge in Maryland, federal safety officials are urging bridge owners to conduct risk assessments to prevent another tragedy.

A new NTSB report compiled after the Francis Scott Key Bridge collapse in Baltimore shows that San Francisco's Golden Gate Bridge and four other Bay Area spans may be vulnerable to collapse from a ship strike.