Attendees during a closing campaign rally for presidential candidate Gustavo Petro in Bogotá, Colombia. Petro is ahead in the polls for this Sunday's election, but it's expected to go to a second round in June. Andres Cardona/Bloomberg/Getty Images hide caption
Colombian presidential candidate Gustavo Petro speaks during a campaign rally in Medellín, Colombia, on April 7. Petro is polling first ahead of the May 29 election. Edinson Ivan Arroyo Mora/Bloomberg via Getty Images hide caption
Ivan Duque, presidential candidate for the Democratic Center, and his vice presidential candidate Marta Lucia Ramirez, raise arms after winning the first round of Colombia's presidential election. A runoff with Gustavo Petro will be held June 17. Fernando Vergara/AP hide caption
A man casts his vote at a polling station in Cali, Valle del Cauca Department, during parliamentary elections in Colombia on March 11. The elections are the first that FARC will partake in as a legal political party. (Luis Robayo/AFP/Getty Images) Luis Robayo/AFP/Getty Images hide caption
A FARC supporter waves a banner during the launch of Timochenko's presidential campaign in Bogotá, Colombia, on Saturday. The word for "liberty" in Spanish is stamped on his tie. Manuel Rueda for NPR hide caption