Inside Story - Is South Sudan on the verge of collapse?

Despite a ceasefire agreement, fighting between government soldiers and rebels rages. Mike Hanna speaks to : Aly Verjee, senior researcher at the Rift Valley Institute, and author of "Race against time: The Countdown to the Referenda in Southern Sudan and Abyei"; Abdelwahab El-Affendi, professor of politics at the University of Westminster; and Michael Makuei Lueth, South Sudan information minister and government spokesman.