** FILE ** This May 16, 2011, file photo supplied by the South African Government Communications and Information Services, GCIS, shows former South African President Nelson Mandela and his wife Graca Machel after they cast an early ballot in upcoming local elections at his home in Johannesburg, South Africa. (AP Photo/Elmond Jiyane-GCIS, File)

Photo by: Elmond Jiyane

** FILE ** This May 16, 2011, file photo supplied by the South African Government Communications and Information Services, GCIS, shows former South African President Nelson Mandela and his wife Graca Machel after they cast an early ballot in upcoming local elections at his home in Johannesburg, South Africa. (AP Photo/Elmond Jiyane-GCIS, File)