It happened over a longer period obviously, and what happened is the US adopted a failed industrial policy that saw our core manufacturing base shipped to China for the benefit of Wall Street and the financial sector.

Detroit was the hub of the auto industry. Outsourcing and foreign competition hollowed out the central city (which deliberately didn't have public transit) and left gigantic abandoned houses and skyscrapers throughout.

There has been massive public investment and popular support to cause a revival of sorts in the city and is a success story.

Go look at some photos from like 2010-2014.