South Sudan foes agree 'permanent' ceasefire within 72 hours South Sudanese rebel leader Riek Machar and South Sudan President Salva Kiir sign a peace agreement in the presence of Sudanese President Omar al-Bashir in Khartoum. Kiir and his arch-foe Machar agreed to a "permanent" ceasefire to take effect within 72 hours, raising hopes of an end to nearly four-and-a-half years of war. IMAGES AND SOUNDBITES