What can one building tell us about Venezuela?

Once a futuristic symbol of all that Venezuela could become, a building called El Helicoide in the country’s capital is now the headquarters of the intelligence services and a prison for political prisoners. We speak to Karenina Velandia, who has been investigating the prison, about the dramatic collapse of the once-wealthy country she grew up in. You can read her report here: https://www.bbc.co.uk/news/world-latin-america-46864864Producer: Heidi Pett