Dam in Mariana
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Brazil dam collapse: Six months on

It has been six months since the collapse of a dam near the city of Mariana released a wave of sludge that killed 19 people, devastated villages and left dozens of cities with no water supply.

Reconstruction has not yet begun and the causes of the dam's failure are still being investigated, as Julia Carneiro reports.

Go to next video: Many still missing after dam burst