South Sudan rival leaders given 100 more days to form unity government South Sudan President Salva Kiir and rebel leader Riek Machar have been given another 100 days to form a power-sharing government after failing to resolve differences over a peace deal. IMAGES of rebel leader Riek Machar, South Sudan president Salva Kiir, Ugandan president Yoweri Kaguta Museveni and Sudan's Transitional Council Abdel Fattah al-Burhan posing after talks at State House