Italy's high court has explained why it reversed the acquittal of Seattle's Amanda Knox - it says the decision to acquit was full of contradictions. // Naveena Shine's living on light experiment is finished. // In his bestselling "Buried in the Sky," Portland writer Peter Zuckerman tells the amazing story of two Sherpas who survived K2's deadliest day. With news of a recent fight high on Everest, questions have been raised about the relationship between local Sherpas and Western climbers. Zuckerman joins us to explain the contract between mountain climbers and the men who carry their gear. // Your turn.