Description : An exclusive portrait of Nelson Mandela, former president of South Africa, at the lecture by Prof Muhammad Yunus at the Seventh Nelson Mandela Annual Lecture. Also known as Madiba in his homeland, Nelson Mandela is will turn 91 on 8 this year. The anti-apartheid activist, who was once the leader of the African National Congress (ANC), met fellow Nobel Peace Prize recipient Prof. Muhammad Yunus from Bangladesh who was in the country to speak at the Seventh Nelson Mandela Annual Lecture in Johannesburg. Johannesburg, South Africa.