President Salva Kiir calls for calm after Army General and 27 others are killed

President Salva Kiir Mayardit is calling for calm after Army General David Majur Dak and 27 others were killed in an attack by the White Army militia in Nasir County today. The victims were being evacuated aboard two UN helicopters when they came under attack. For VOA news Deng Ghai Deng reports from Juba.