Five years after virtually every world leader agreed to “phase down” the burning of coal for climate reasons, the fuel is more widely used than ever.

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The United States threatened sanctions for any country or entity that engages with Iran’s gold, digital assets, aviation, shipping and tech industries. Here’s why that matters.

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For Florida-based Powerus, becoming a global supplier of counterdrone technology has meant involving the Trumps, a golf course and a new way of doing business.

© Brendan Hoffman for The New York Times