Are we simply the sum of our experiences? Or can we choose our own path? In this hour, TED speakers share stories of undergoing remarkable transformations despite extraordinary challenges.  Zak Ebrahim tells the story of being raised to hate, as the son of terrorist El-Sayyid Nosair, and how he chose a different path. Fashion model Geena Rocero talks about being born a boy, and becoming who she was meant to be. MIT professor Hugh Herr describes how he lost both legs in a climbing accident 30 years ago, and how he’s now building the next generation of bionic limbs. Writer Shaka Senghor recounts his long journey from crime to prison to redemption.