Byron Pitts picks one of his favorite "60 Minutes" stories on The Seed School which poses the question if "there’s boarding schools for rich kids; why aren't there boarding schools for poor kids?" Then, 47 years after the murder of Louis Allen, "60 Minutes" goes to Liberty, Miss. in search of his killer; Also, Playing soccer at 11, Kenan stepped on a landmine. At 28, he leads by example, showing maimed children how good life can be.