Thousands of workers begin strike at world’s biggest copper mine

[caption id="attachment_800444" align="aligncenter" width="600"] Escondida pit at night. (Source: BHP Billiton)[/caption] Close to 2,800 miners at Chile's Escondida, the world's biggest copper mine, began a 24-hour “warning” strike on Monday morning as they seek to negotiate better working conditions, Publimetro...