A protester covered in mud and holding a sign reading "Vale murderer" takes part in a demonstration in front of the Se Cathedral in Sao Paulo, Brazil, on February 1, 2019. - A tsunami of mineral-laced mud broke through a dam at an iron-ore mine owned by Brazil's mining giant Vale near the town of Brumadinho on January 25, with the official toll of the disaster standing so far at 115 dead and 248 missing. (Photo by Miguel SCHINCARIOL / AFP)