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BBC Radio 5 live: Checkpoint Charlie as it is today
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BBC Radio 5 live: Nicky Campbell checks out the merchandise
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BBC Radio 5 live: Nick Campbell with a Stalin bust
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BBC Radio 5 live: "You are leaving the American Sector"
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BBC Radio 5 live: Michael Reagan at the Berlin Wall Museum
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BBC Radio 5 live: Alexandra Hildebrandt - the Director of the Berlin Wall Museum