Inside Cracolandia, Sao Paulo's neighbourhood of open-air drug use

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In the heart of the Brazilian city of Sao Paulo – the largest metropolis in the Americas, with 12 million inhabitants – lies Cracolandia. Literally the "land of crack cocaine", it's a dangerous area frequented and inhabited by homeless people and drug users. They have no shelter, water or sanitation. Due to the lack of public services in the city, NGOs have provided food, work and entertainment for these extremely vulnerable people for many years. Our correspondents followed a psychiatrist who is trying to help people get out of Cracolandia.