Colombians are heading to the polls this Sunday to elect a new president. The frontrunner is Abelardo de la Esperiella. He has vowed to return to full-scale military confrontation with armed groups. His challenger is leftwing senator Iván Cepeda, he argues for modifying the current peace plan, which seeks disarmament through negotiations. Six decades of conflict has killed hundreds of thousands of people, and each candidate has a starkly different vision on how to end it… Analysis by Mariano Aguirre Ernst, associate fellow at Chatam House’s International Security Programme.