In Colorado, two millennial candidates are thinking about A.I.

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The response came after Homeland Security ordered the removal and exclusion of products developed by the Chinese company.

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Expected windfalls from I.P.O.s are drawing health leaders into a race for billions in new philanthropic dollars. A fragile aid system may be upended.

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Plans to build one of Europe’s largest data centers in Devon have been met by strong opposition from residents, as environmental concerns grow.

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