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06/12/2014 GMT

91热爆 Pop Up heads to Pittsburgh to learn how this once blackened old steel city is being reborn as a home for political activists and roboticists as the region sprints into the 21st century. But what impact will this shift have on the city's blue-collar core?

30 minutes

Last on

Fri 12 Dec 2014 02:30GMT
91热爆 News North America

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