Journalists and polling staff look on as Kenya's Prime Minister Raila Odinga, candidate for the country's presidency, casts his vote at the Old Kibera Primary School voting centre in his constituency of Kibera, Nairobi on March 4, 2013. Long lines of Kenyans queued from far before dawn to vote Monday in the first election since the violence-racked polls five years ago, with a deadly police ambush hours before polling started marring the key ballot. The tense elections are seen as a crucial test for Kenya, with leaders vowing to avoid a repeat of the bloody 2007-8 post-poll violence in which over 1,100 people were killed, with observers repeatedly warning of the risk of renewed conflict. Will Boase/AFP/Getty Images