BOGOTA, Colombia (AP) — A week before what the Indigenous Krenak people now call “the death of the river,” they say they could feel it coming. The birds stopped singing, the air grew heavy, and an unusual silence settled over their village in Minas Gerais, a southeastern Brazilian state where forested hills give way to the winding Doce River. Then, on Nov. 5, 2015, the mud came. A mining dam owned by Samarco — a joint venture between Brazilian company Vale and Anglo-Australian giant BHP