This week, there have been several days of protests in Haiti against the presence of UN troops in the country. The immediate catalyst has been the widespread belief among Haitians that UN troops are responsible for the outbreak of cholera in Haiti – a belief for which there is considerable evidence, which the UN has encouraged by its refusal to support an investigation into the causes of the cholera outbreak, ignoring calls from Haitian officials and international public health experts for such an investigation. Why are there UN troops in Haiti? What is the timetable for their withdrawal?