Is coltan - the notorious conflict mineral from which two hi-tech metals are derived - still being smuggled from DR Congo into Rwanda, to evade taxes and sourcing controls? Show more
Discover 11,128,835 listings and 279,453 playable programmes from the BBC
Is coltan - the notorious conflict mineral from which two hi-tech metals are derived - still being smuggled from DR Congo into Rwanda, to evade taxes and sourcing controls? Show more