There are some frightening warning signs that a genocide may erupt in South Sudan. The country has been at war with itself for the better of three years, ever since a political dispute between President Salva Kiir and his Vice Preisident Riek Machar turned into an armed conflict between those two men. The conflict took on ugly sectarian dimensions--these men hail from different ethnic groups--and peace has been elusive.    In recent weeks, however, it seems that the government of Salva Kiir is readying itself to commit ethnic-based mass atrocities for reasons that my guest Cameron Hudson explains. Cameron is the director of the Simon-Skjodt Center for the Prevention of Genocide at the US Holocaust Memorial Museum. He's also a former CIA officer with extensive background in the region. And in this episode, he explains what conditions are ripe for genocide in South Sudan are ripe.