Federal officials investigating the catastrophic collapse of the Francis Scott Key Bridge in Baltimore, Maryland, warned on Thursday that 68 bridges nationwide could be at similar risk.

These amazing feats of engineering allow trains to navigate the steepest valleys and cross the deepest rivers.

TOLEDO, Ohio — Two bridges that cross the Maumee River in Toledo could suffer the same catastrophe the Francis Scott Key Bridge in Baltimore did last year if a ship hit them, according to a ...