Former South African President Nelson Mandela celebrates his 94th birthday with his family at his home in Qunu in South Africa's Eastern Cape province, in this handout picture taken July 18, 2012. [Photo/Agencies]

Former South African President Nelson Mandela smiles at his great-grandchildren Zesilo Hlongwane and Ziyanda Manaway (R) on his 94th birthday at his home in Qunu in South Africa's Eastern Cape province, in this handout picture taken July 18, 2012. South Africans celebrated Mandela's 94th birthday on Wednesday with giant cakes, mass renditions of "Happy Birthday" and 67 minutes of good deeds - one for each year of the anti-apartheid leader's struggle against white-minority rule. [Photo/Agencies]