What next for the British monarchy?

Hundreds of thousands of people are expected to line up for miles to say farewell to their Queen. Simon Schama is a scholar of monarchy in Britain and around the world, awarded a knighthood for services to history in 2019. He joins Christiane outside the Palace of Westminster, where the Queen is lying in state. 

Also on today's show: NATO Secretary General Jens Stoltenberg, Chief Executive of the Civil Society Coalition for Climate Change Aisha Khan.

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