In this Sept. 3, 2014 photo, villagers leading donkeys loaded with the working tools for anthropologists, traverse a mountain pass on a journey to help forensic investigators locate the common graves of those killed in a 1984 massacre in the Paccha village of Peru. Arriving is not easy. This rugged southeastern region known as “Oreja de Perro,” or Dog’s Ear, lacks telephones, grocery stores and good roads. (AP Photo/Rodrigo Abd)

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