In March, the US president imposed tariffs of 25% on imports of steel and 10% on aluminium.
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Business Blog
The BBC's Karishma Vaswani explains how other countries could end up taking a direct hit from US tariffs.
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A promise to slash consumer prices after Asda merger could hit suppliers hard, say industry groups.
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Mobile operators are using drones to improve mobile communications and help emergency services
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Jan Koum says he wants to pursue new projects, but reports say he clashed with parent company Facebook.
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The US says the firm hired consultants for "improper" purposes and concealed payments to sales agents in Asia.
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