South Sudan rivals agree to form unity government by deadline South Sudan's president and its armed opposition leader agree to form a power-sharing government by a February deadline, as they face international censure over faltering peace talks. President Salva Kiir and his former deputy, Riek Machar, signed a truce in September 2018 but until now had failed to respect a cornerstone of that agreement -- that they form a unity government and lay their differences to rest. IMAGES AND SOUNDBITES