Maryland marked one year since the deadly bridge disaster in Baltimore. Now, the NTSB is urging other bridge operators to conduct critical safety checks to avoid another tragedy. FOX's Caroline Shively reports from Baltimore.

Sixty-eight bridges across the US should be assessed to see if they are at risk of collapse if hit by a ship, transportation safety officials found, while urging the bridges’ owners to undertake immediate vulnerability assessments.

The safety board issued recommendations as part of its ongoing investigation into the collapse of Baltimore’s Key Bridge last year after it was hit by a ship.