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In Comuna 13, one of Medellin's poorest and most violent districts, there is a giant rubbish dump - la escombrera. Local people say it's where the truth lies buried. They're talking about the disappeared - dozens of victims of Colombia's bloody, civil conflict concealed beneath the mountains of junk.

La escombrera stands in contrast to the 'Medellin Miracle' - the city's transformation over two decades from the darkest days of Pablo Escobar and his drug trafficking cartel, to its triumph in being voted the world's most innovative.

For Crossing Continents, Linda Pressly reports on the move to begin digging for human remains.