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Dan talks to Peter Devitt from the RAF Museum about the the RAF pilots from the Caribbean who fought in the Second World War, and what some of them found when they came back to Britain later.
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Dan talks to Joanne Freeman about the history of polarisation in the USA, giving an extraordinary insight into the tone of American politics' early days.
Frances Welch has written for the Sunday Telegraph, Granta, The Spectator and the Financial Times. She is author of Rasputin: A Short Life.
Calder Walton talks to Dan about Russian interference in past elections.