The cities selling homes for one dollar

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Is selling off abandoned homes for a dollar or a pound the answer to invigorating a city? We meet some of the people in the port cities of Baltimore in the US and Liverpool in the UK who have taken part in similar housing revival schemes. Is it an easy win, or is solving a city's problems more complicated? (Picture: Maxine Sharples, who bought a house in Liverpool for a £1, holding a photo showing her undertaking renovation work in her home.) Presented and produced by Rowan Bridge