South Sudan president suspends vice president and cabinet Heavily armed South Sudanese security forces guarded key government institutions in the capital Juba Wednesday as radio broadcasts called for calm after the president suspended his cabinet and his main political rival. Those removed by President Salva Kiir include two of the country's most influential leaders -- his rival vice-president Riek Machar Machar and Pagan Amum, the secretary-general of the ruling party, the Sudan People's Liberation Movement (SPLM). The sackings have sparked concern over potential instability in the fledgling nation, which is awash with guns, riven by ethnic rivalries and still reeling from decades of war. Images and soundbites