Tunisian presidential candidate Beji Caid Essebsi, leader of the anti-Islamist Nidaa Tounes party, leaves after casting his vote at a polling station in Tunis, capital of Tunisia, Dec. 21, 2014. Polling started in Tunisia on Sunday in a landmark run-off to choose the country's first president nearly four years after the political and social turmoil during late 2010 and early 2011.