TO GO WITH AFP STORY Copper melts in the [Getty Images]

CALAMA, CHILE: TO GO WITH AFP STORY Copper melts in the foundry of the Chuquicamata copper mine, in the desert town of Calama, 1000 km north of Santiago, Chile, 25 October, 2005. Chuquicamata, the world biggest opencast mine, is 4,3 kilometer long, 3 km large and 825 meter deep. As all the other mining enterprises in Chile, it was nationalized in 1971 by late Chilean President Salvador Allende. AFP PHOTO MARTIN BERNETTI (Photo credit should read MARTIN BERNETTI/AFP via Getty Images)

AFP MARTIN BERNETTI