Police keep an eye on striking mine workers as they march to a smelter plant at the Lonmin Platinum Mine near Rustenburg, Wednesday, Sept, 12, 2012 to hand over a memorandum to mine management and to ensure that workers had not reported for work. Miners are refusing to return to work until their demands over low pay and working conditions are met. Strikes are also spreading to nearby gold mines. (AP Photo/Denis Farrell)
