South Africa's President Jacob Zuma, left, interacts with striking mine workers at the Lonmin mine near Rustenburg, South Africa, Wednesday, Aug. 22, 2012. Demands for higher wages spread to at least two other platinum mines in South Africa and raise fears instability could spread to more of the country's mines that provide 75 percent of the world's supply of the precious metal. South Africa's miningweb.co.za Web site calls it "a possibly ominous development." A 12-day strike at the Lonmin PLC mine resulted in police killing 34 striking miners and wounding another 78 last week. (AP Photo/Themba Hadebe)

South Africa's President Jacob Zuma, left, interacts with striking mine workers at the Lonmin mine near Rustenburg, South Africa, Wednesday, Aug. 22, 2012. Demands for higher wages spread to at least two other platinum mines in South Africa and raise fears instability could spread to more of the country's mines that provide 75 percent of the world's supply of the precious metal. South Africa's miningweb.co.za Web site calls it "a possibly ominous development." A 12-day strike at the Lonmin PLC mine resulted in police killing 34 striking miners and wounding another 78 last week. (AP Photo/Themba Hadebe)