UN welcomes ceasefire in South Sudan David Shearer, Special Representative of the Secretary-General speaks at a press conference in Juba, South Sudan, on the peace process in the country. South Sudan's President Salva Kiir and his arch-foe Riek Machar have agreed to a "permanent" ceasefire, raising hopes of an end to four-and-a-half years of war. IMAGES AND SOUNDBITES