Artisanal gold miners pan sediment for gold at an illegal mine-pit in Walungu territory of South-Kivu province near Bukavu, April 5, 2014. Democratic Republic of Congo aims to double tax revenues from minerals but investors warned that an overhaul of the mining code could remove incentives to invest there. Picture taken April 5, 2014. REUTERS/Kenny Katombe (DEMOCRATIC REPUBLIC OF CONGO - Tags: BUSINESS EMPLOYMENT COMMODITIES SOCIETY)