RUBAYA, Congo — Nestled in the green hills of Masisi territory in Congo, the artisanal Rubaya mining site hums with the sound of generators, as hundreds of men labor by hand to extract coltan, a key ...
CARACAS, Oct 14 (Reuters) - Venezuela has discovered a large reserve of coltan and sent soldiers in to keep away illegal miners, President Hugo Chavez said on Wednesday. "Now a strategic mineral has ...
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