Welcome to Porto Velho and Urso Branco, two of the worst prisons in Brazil. As the cocaine trade reshaped the criminal landscape in Brazil, its prisons became increasingly overcrowded and unmanageable, ruled by rival drug gangs battling for power. Heavily armed guards stand between the prisoners and utter chaos, but even their training and firepower are sometimes not enough.

Welcome to Porto Velho and Urso Branco, two of the worst prisons in Brazil. As the cocaine trade reshaped the criminal landscape in Brazil, its prisons became increasingly overcrowded and unmanageable, ruled by rival drug gangs battling for power. Heavily armed guards stand between the prisoners and utter chaos, but even their training and firepower are sometimes not enough.