In this second part of our tale of dams, we will hear what happens once things go horribly wrong.

Throughout history, faulty dams have created man-made disasters costing lives and the earth.

We will be hearing about one disaster in particular - The Mariana Dam Disaster - that happened in Brazil in 2015.

We will also revisit the town of Gatun, the dam that was built there and the lake that made the Panama Canal, with a somber look on the life of ordinary people there.