Nelson Mandela: South Africa celebrates 'greatest son'

South Africans have been paying tribute to their former leader, Nelson Mandela, who has died at the age of 95.

Crowds gathered outside his family home in the Houghton suburb of Johannesburg, to celebrate his life.

The country's President, Jacob Zuma, said South Africa had "lost its greatest son".

Gabriel Gatehouse reports from Johannesburg.