Yale to Hand Back 4000 Artifacts to Machu Picchu

After years of battling over the thousands of pieces of pottery, jewelry and bones, taken from Machu Picchu 90 years ago, Peru is winning the war. The artifacts were lent to Yale University for 18 months but the university has apparently kept them ever since one of its alumni, U.S. explorer Hiram Bingham, rediscovered Machu Picchu in the Andes in 1911.

Like museums in Greece or Egypt trying to get the United Kingdom and other countries to return their ancient treasures, Peru has been fighting to get back theirs from the US. Since we officially frown on imperialism, why do we drag our feet returning that stuff?