Workers of Bolivia's Corocoro copper mines prepare copper sheets after the sale of 1,020 tonnes of copper cathodes with a purity of 99.99 percent and a value of $60 million to the consortium Cormin Peru in CoroCoro, some 85 km southwest of La Paz, October 5, 2010.The only copper mine in Bolivia resumed exports after being closed for 25 years while preparing to receive a massive South Korean investment, local media reported. Picture taken in October 5. REUTERS/Gaston Brito (BOLIVIA - Tags: ENERGY BUSINESS)