As Desmond Tutu turns 90 on Thursday, he remains indisputably the moral voice of South Africa. But age is catching up with him.
Ku wa kane, ubwo Desmond Tutu yujuje imyaka 90, akomeza kuba ijwi rya rubanda ryamagana Aparteid muri  Afurika y'Epfo. Ariko imyaka agera aho arasaza