Angola is set to hold elections on August 23 to choose a successor to President Eduardo dos Santos after 38 years of rule. Dos Santos, 74, has been in power since 1979 and has announced that he will not contest the election. His ruling party's presidential candidate will be the current defence minister. Tsepiso Makwetla spoke to Presidential hopeful and Secretary General of opposition party UNITA - Rafael Savimbi, who's also the son of Jonas Savimbi...