LIMA, Peru Peru is preparing a lawsuit against Yale University to retrieve artifacts taken nearly a century ago from the Inca citadel of Machu Picchu, a government official said Wednesday. Peru has held discussions in recent years with Yale seeking the return of nearly 5,000 artifacts, including ceramics and human bones that explorer Hiram Bingham dug up during three expeditions to Machu Picchu in 1911, 1912 and 1914. "Yale considers the collection university property, given the amount of time it has been there," said Luis Guillermo Lumbreras, chief of Peru's National Institute of Culture, in an interview with The Associated...