A man writes his wishes to mourn the death of former South African president Nelson Mandela on Nelson Mandela Square in Johannesburg, South Africa, on Dec. 8, 2013. South Africa declared December 8, 2013 as a national day of prayer and reflection in places of worship, homes and communities to celebrate the life of Mandela and the legacy he has left. (Xinhua/Meng Chenguang)

A girl mourns the death of former South African president Nelson Mandela on Nelson Mandela Square in Johannesburg, South Africa, on Dec. 8, 2013. South Africa declared December 8, 2013 as a national day of prayer and reflection in places of worship, homes and communities to celebrate the life of Mandela and the legacy he has left. (Xinhua/Meng Chenguang)

People mourn the death of former South African president Nelson Mandela on Nelson Mandela Square in Johannesburg, South Africa, on Dec. 8, 2013. South Africa declared December 8, 2013 as a national day of prayer and reflection in places of worship, homes and communities to celebrate the life of Mandela and the legacy he has left. (Xinhua/Meng Chenguang)