Tunisia has been thrown back into turmoil following the assassination of a leading opposition politician. The murder has brought violence back to the birthplace of the Arab Spring. There is also growing anger over the slow pace of reform. It is dividing political leaders, and fuelling calls for yet more change. Tunisia's revolt was hailed as a blueprint for the Arab uprisings; the removing of a long time dictator and the transition to democratic parliamentary elections. But Tunisia's journey along the road to reform is unravelling. What does the assassination mean for the birthplace of the Arab Spring? And is the country's transition towards democracy in danger of being derailed?