** FILE ** ** TO GO WITH STORY SLUGGED ZAMBIA COBRE ** Zambian workers constructing a new $300 million copper smelter in Chingola, Zambia, in this Wednesday, Dec. 13, 2006 file photo. Surging global demand for copper has breathed new life into the mining industry in Chingola, a short drive from the Congolese border on top of some of the richest copper deposits in the world. (AP Photo/Joseph Schatz, File)