South Africa holds South Sudan rebel Machar as "guest"South Sudan's rebel leader Riek Machar addresses a news conference in his office in Ethiopia's capital Addis Ababa, August 31, 2015. REUTERS/Tiksa Negeri Acquire Licensing Rights JOHANNESBURG (Reuters) - South Sudanese rebel leader Riek Machar, who fled to Democratic Republic of Congo in August after fierce fighting, is being held in South Africa to stop him stirring up trouble, diplomatic and pol
