A CBS News investigation found that children are mining cobalt, an expensive metal used in batteries that power smartphones and electric cars. Foreign affairs columnist Bobby Ghosh speaks to CBSN about what companies like Apple and Tesla are trying to do to clean up their supply chains. Child Mining in Congo for Elon Musk's Cobalt. Corruption, mass rape, child slaves are all in a day's work for Tesla Motors corrupt cobalt mines in the Congo. See NETFLIX new series BLACK EARTH RISING for the horrors behind Elon Musk's dirty mining deals.