(The opinions expressed here are those of the author, a columnist for Reuters) By Andy Home LONDON, Feb 14 (Reuters) - The collapse of Vale's Brumadinho iron ore tailings dam in Brazil was both ...

(Repeats Feb. 14 column with no changes ... The collapse of Vale's Brumadinho iron ore tailings dam in Brazil was both shocking and devastating in its impact. But it was not a one-off event.