Fentanyl wars in Mexico

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We report on the big drug cartels in Sinaloa state in Mexico. They have made billions from trafficking the deadly drug fentanyl to the United States but have turned their cities into war zones as they compete for dominance of the drug market. It follows news this week of the death of one of the country's most wanted drug lords. Nemesio Ruben Oseguera Cervantes, known as "El Mencho," was killed on Sunday in an operation to arrest him, and his death has sparked a wave of violence right across the land. A BBC investigation has revealed that Nepal’s top police officer gave the order allowing the use of live fire during last year's "Gen Z" protests in the capital, Kathmandu. The unrest in September was triggered by a ban on social media. Nineteen people were shot dead; the youngest was seventeen years old. And United States and Iranian officials are due to meet in Geneva on Thursday for a third round of indirect talks, as President Donald Trump threatens to strike Iran if a nuclear deal is not reached. But as the regime comes under pressure from outside, internal pressure is also building with what appears to be a fresh wave of anti-government protests. We hear from a university student who took part in the protests. Presenters: James Copnall and Anne Soy. (Photo: Paramedics tend to a wounded man in Culiacan in Sinaloa, Mexico. Credit: Darren Conway/BBC News).