This week, Spotlight on Africa turns to the Great Lakes region. First, a new Global Witness report reveals how coltan is being smuggled out of the Democratic Republic of Congo, amid the ongoing conflict in the east, through Rwanda and on to companies worldwide. Then, artist Grada Kilomba discusses her journey to create a unique monument for Paris commemorating the 1994 Rwandan genocide.

This month, a new report from the NGO Global Witness has revealed how coltan is being smuggled out of the Democratic Republic of Congo and sold to companies worldwide via Rwanda, amid the devastating conflict in the country's eastern provinces. Coltan, short for columbite-tantalite, is a mineral from which the metals tantalum and niobium are extracted, both classified as critical raw materials by companies from the United States, the European Union, China and Japan. The report finds that conflict minerals from the war-torn east of the DRC are present in everyday technology products made by major global companies. It also links the illegal trade to Rwandan firms and to leading international brands including Amazon, Ericsson and Sony, which source minerals from eastern DRC. The trafficking is linked to the M23 militia, accused of widespread sexual violence, summary executions and torture.