 How do you stop violence in Colombia? Well, according to its president, it's by legalizing the cocaine trade. Hello, thank you for tuning in to the Marketplace Morning Report, and we're coming to you live from the BBC World Service. I'm Leanna Byrne. Colombia's president, Gustavo Petro, says the armed conflict in his country would end within a day if the UN declares cocaine legal across the world. He says that illegal cocaine trade's massive profits fuel violence by supporting armed groups.