One man instrumental in dismantling apartheid, despite being a part of the racist system, was former South African president FW de Klerk.
It was his government that ordered Mr Mandela's release.
As part of our special coverage to mark twenty years since Nelson Mandela walked free from 27 years in prison, we talked to the former president about that critical time in South African history.
Part one - Moving towards a free South Africa
Part two - Relationship with Mandela
BBC's Peter Ndoro asked Mr de Klerk what sort of relationship the two men had over the years.
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