2008-01-16 Medellin, Colombia. Only five years ago Barrio Popular was the most dangerous neighborhood in what was long considered the most dangerous city in the world, Medellin in Colombia. An extensive urban redevelopment plan was initiated by Medellin?s former Mayor Luis Peres and successfully continued by the current one, Sergio Fajardo. The former slum on a steep mountainside in the poor north of the city has now become one of the safest places in the country and is becoming a tourist attraction. The valley bound metro system has been extended. Several public cable car lines were constructed and go up the mountainsides effectively opening up the crammed favelas. Reconstruction and relocation programs have reduced the population density. Paramilitary groups gave up their arms and entered a reintegration program and former gang members were employed in construction projects. Unemployment rates have gone down and education levels went up. A big library in the shape of 3 black crystals has become the landmark and the pride of Barrio Popular.