Marines evacuate about 20 US military staff from Juba . She was not authorized to say when the two sides might meet face-to-face . U.S. citizens in South Sudan refuse to take evacuation flights . Talks between government and rebel leaders bring no firm results on first day . Government forces are closing in on the town of Mara , army spokesman says .
Marines evacuate about 20 US military staff from Juba . U.S. citizens in South Sudan refuse to take evacuation flights . Talks between government and rebel leaders bring no firm results on first day . Government forces are closing in on the town of Mara , army spokesman says .