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Ros Atkins on... Trump's plan for Greenland

President Trump has repeated claims that taking control of Greenland is essential for US national security - as Vice-President JD Vance and his wife Usha visit a US space base there on Friday.

The BBC's Analysis Editor Ros Atkins looks at what the Trump istration wants from Greenland - and the controversy surrounding the trip.

Produced by Catherine Karelli.