As the mayor of Cali, Colombia, epidemiologist Rodrigo Guerrero (left) meets with the police once a week to review murder statistics. Courtesy of Prensa Alcaldía de Calí hide caption

itoggle caption Courtesy of Prensa Alcaldía de Calí

Clara Rojas waves as she arrives at an airport near Caracas, Venezuela, on Jan. 10, 2008, after being released from six years of captivity by Colombian rebels. Gregorio Marrero/AP hide caption

itoggle caption Gregorio Marrero/AP

Colombian army soldiers patrol the Loma de Cristo—bal neighborhood after warring gangs forced dozens of families to flee. Medellin used to be the most dangerous city in the world but officials embarked on innovative projects designed to make life better in tough neighborhoods. Paul Smith for NPR hide caption

itoggle caption Paul Smith for NPR

Isabel Narvaez, in El Placer, says she is still traumatized by the rape she suffered. The small hamlet in Colombia is just one place where women were victims of violent crimes during the civil conflict. Paul Smith for NPR hide caption

itoggle caption Paul Smith for NPR