File photo taken on Sep. 16, 1995 shows the then president of South Africa Nelson Mandela (R) being accreditated the doctor degree by the chairman of the board of the University of South Africa in Pretoria, South Africa. Former South African President Nelson Mandela is in "serious but stable" condition after being taken to a hospital to be treated for a lung infection, the government said Saturday, prompting an outpouring of concern from admirers of a man who helped to end white racist rule. [Li Xiaoguo/Xinhua]