Former South African president Nelson Mandela looks on as he celebrates his birthday at his house in Qunu, Eastern Cape July 18, 2012. [Photo/Agencies]

Former South African president Nelson Mandela (R) celebrates his birthday with his wife Graca Macel at his house in Qunu, eastern cape, July 18, 2012. South Africans celebrated Nelson 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]