by Hector Velasco Agence France-Presse BOGOTA, Colombia (AFP) — Colombians vote Sunday in a presidential runoff that features promises of radical change in a country saddled with widespread poverty, violence and other woes. After a tense campaign marked by claims of death threats against several candidates, opinion polls have leftist Gustavo Petro and businessman Rodolfo Hernandez neck-and-neck. Should he win, former guerrilla Petro would become Colombia’s first left-wing president. If not, the independent Hernandez, a […]