Every day they go to work, they have no idea whether they will return home alive.
They are Zama Zamas – men who risk everything to go deep underground in South Africa's dangerous disused gold mines to scratch a living.
Poverty forces them beneath the earth to search for gold.
Some will be arrested for illegal mining.
Some will die.
In "We Are Zama Zama", BBC Africa Eye tells their stories.
The events in this film were captured by an independent filmmaker and acquired by the BBC.
The film has been re-edited from a longer version.