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An Anonymous Coward writes:

https://www.npr.org/2018/08/14/638462800/suspension-bridge-on-busy-highway-partially-collapses-in-genoa [npr.org]

A bridge built in the 1960s for a major highway has collapsed, killing 20 people as an initial estimate.

Besides the obvious news value of this event, I'd be curious of any civil engineers or structural engineers could comment on the engineering behind such things. What causes these types of crumblings to happen, and exactly how reliable is infrastructure around the world?

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