The global financial crisis and a sharp decline in metal prices have forced mining companies in Zambia to lay off thousands of their employees. <br /><br />As the largest producer of copper in Africa, Zambia relies on exports to keep its economy running. But as the copper mines struggle, earnings have dropped.<br /><br />Al Jazeera's Haru Mutasa reports from the town of Chingola in Zambia's copper belt.