The Chesapeake Bay Bridge in 2021. Adobe StockBefore its disastrous collapse last week, the Francis Scott Key Bridge served as an economically crucial gateway: Thousands of container ships crossing from the Atlantic to Baltimore’s port passed under the bridge’s decades-old span.But the now-ruined structure isn’t the only bridge along that same key shipping route: Twenty miles downstream, massive container ships headed to Baltimore also pass under the Chesapeake Bay Bridge near Annapolis. And according to experts who reviewed its design for CNN, it could also be at risk of collapse if…