Siemon Wezeman, senior researcher with the Sipri Arms and Military Expenditure Programme, tells us about the think tank’s latest report on global weapons sales. Plus: Joe Biden hosts Poland’s president and prime minister in Washington, Mipim kicks off in Cannes and a special interview with director Brian Knappenberger about his ground-breaking new docuseries, ‘Turning Point: The Bomb and the Cold War’.

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