South Sudan Opposition Leader Riek Machar signs on a peace deal reached with South Sudan government in Khartoum, South Sudan, June 27, 2018. The parties to the conflict in South Sudan on Wednesday signed Khartoum Peace Agreement in South Sudan, including permanent ceasefire taking effect within 72 hours, according to Sudan's Foreign Minister Al-Dirdiri Mohamed Ahmed. (Xinhua/ Mohamed Khidir)