4 Pa. bridges among those recommended for safety evaluation by NTSB following collapse of Key Bridge in Baltimore
The Walt Whitman, Betsy Ross, Benjamin Franklin and Delaware Turnpike bridges should be evaluated to see if they're above ...
NTSB recommends vulnerability assessments on 68 bridges following Key Bridge collapse
The bridges include iconic landmarks such as the Golden Gate Bridge, the Chesapeake Bay Bridge, the Brooklyn Bridge and the Mackinac Bridge.