After being invited to an unprecedented 24 hours of prayer and preaching in the Vatican, South Sudanese leaders appeared stunned as the 82-year-old pontiff, who suffers from chronic leg pain, was helped by aides to kneel and kiss the shoes of the two main opposing leaders. He appealed to President Salva Kiir, his former deputy turned rebel leader Riek Machar, and three other vice-presidents to respect an armistice they signed and commit to forming a unity government next month. ‘I am asking you as a brother to stay in peace. I am asking you with my heart, let us go forward. There will be many problems, but they will not overcome us’, the Pope said. His appeal was made more pressing as anxiety grew over the coup in neighbouring Sudan, which could risk the fragile peace deal that ended South Sudan’s brutal five-year civil war.