The Francis Scott Key Bridge was built in 1977. It's a Truss Bridge. An Engineer on CTV explained that each support, including the ones on the land, act as one integrated unit to hold the Bridge up. If there is a Critical Failure at one point, the whole structure will collapse.
The Engineer also pointed out that when the Bridge was constructed, it would have been anticipated that ships could strike the supports and the Bridge would have been engineered with that in mind; however, Cargo Container ships in 1977 were less than half the size of Cargo Container ships today.
There is no disputing the cause of the collapse; but, based on the interview I watched, I wonder if this could have been reasonably foreseen and if there was anything the State of Baltimore could have done with the Bridge to mitigate this catastrophe.