Former President Nelson Mandela greets recipients of the 2008 Mandela Rhodes scholarship at his offices in Johannesburg March 4, 2008. Mandela celebrates his 90th birthday on July 18. REUTERS/Antony ... more 

Former President Nelson Mandela greets recipients of the 2008 Mandela Rhodes scholarship at his offices in Johannesburg March 4, 2008. Mandela celebrates his 90th birthday on July 18. REUTERS/Antony Kaminju less