Nelson Mandela has undergone a series of treatments recently . Citizens performed at least 67 minutes of public service on his birthday , a reference to the number of years he devoted to helping others . The 94-year-old former president was discharged from the hospital last week . Hide Caption 2 of 27 Photos: He has not appeared in public since South Africa hosted the World Cup in 2010 .
Nelson Mandela has undergone a series of treatments recently . The 94-year-old former president was discharged from the hospital last week . Hide Caption 2 of 27 Photos: He has not appeared in public since South Africa hosted the World Cup in 2010 .