Children in Congo are digging rare earth minerals and ore for weapons, mobile phones and electric cars held at gunpoint by child soldiers. Millions of people have been killed in Congo because they live in resource-rich areas. 'Rape is a weapon of war' says Congolese Dr Denis Mukwege, winner of the Nobel Peace Prize. Erik Luyts, a commodities trader based in Geneva, travels to Congo because the Chinese are becoming too competitive. His wife Pauline...