On November 5, 2015, the Mariana Dam collapsed in Minas Gerais, Brazil, sending 50 million cubic metres of toxic waste barrelling towards small villages.
The incident killed 19 people and devastated indigenous communities.
People lost their homes, families and livelihoods to the onslaught of toxic mud after Fundão dam ruptured, releasing iron ore waste from a nearby mine into the vital Doce River.