Photos: The dangerous work of conflict mineral mining in the Congo

Tunnel 20 entrance

A miner stands outside Tunnel 20.

READ: How conflict minerals funded a war that killed millions, and why tech giants are finally cleaning up their act

Image: Fiona Lloyd-Davies

By Lyndsey Gilpin

Lyndsey Gilpin is a former Staff Writer for TechRepublic, covering sustainability and entrepreneurship. She's co-author of the book Follow the Geeks.