President Trump on Friday said he was cutting off trade talks with Canada and threatened to set a new tariff rate on the country's goods within the next week. Trump said the move was in response to Canada's move to implement a digital services tax on technology companies,

Rare earths are among the most critical raw materials on the planet, deeply embedded in the technologies that underpin modern life. Yet few people had even heard of them until the eruption of the US-China trade war thrust them into the limelight.