Ruling party supporters, gather outside the Mediclinic Heart Hospital where former South African President Nelson Mandela is being treated in Pretoria, South Africa, Thursday, June 27, 2013. Nelson Mandela's health improved overnight and his condition remains critical but is now stable, the South African government said Thursday in a statement that brought a measure of relief to the country. (AP Photo/Themba Hadebe)

Photo by: Themba Hadebe

Ruling party supporters, gather outside the Mediclinic Heart Hospital where former South African President Nelson Mandela is being treated in Pretoria, South Africa, Thursday, June 27, 2013. Nelson Mandela's health improved overnight and his condition remains critical but is now stable, the South African government said Thursday in a statement that brought a measure of relief to the country. (AP Photo/Themba Hadebe)