[Fascinating article sent by a friend of mine whose wife is from Colombia. dg] The cable car is an articulation of the change since the street and warrens were Escobar's fiefdom. As is the building that towers above the barrio's skyline, a granite cliff of award-winning modernist design, the parque biblioteca, or library park, where some of the poorest people in the world come to study, use a computer or just seek respite. These are symbols of defiance and resurgence in Medellín, two decades ago the most dangerous and murderous city on the planet.