Barrick Gold Corp's African Gold Mine

Barrick Gold Corp's African Gold Mine

Trevor Snapp/Bloomberg

Nyagabure Chacha, the father of Daudi Nyagabure, stands by his son's grave in the district of Nyangoto, Tanzania. Daudi Nyagabure, 21, died Feb. 2, 2010, after being shot by mine security forces, his father said.