Soaring gold prices fuel illegal mining boom around Johannesburg

As gold prices climb, illegal miners known as zama zamas are swarming abandoned shafts west of Johannesburg, leaving sinkholes and scarred land. An animal welfare charity in Roodepoort says miners drained its water tanks, and police told it the problem was too big to tackle. Police reported 71 arrests nationwide in one week, but researchers estimate illegal miners number in the tens of thousands.