For 20 years, Sarah Scantlin was seemingly unaware of the world around her after she was hit by a drunk driver in an accident that sent her into a comatose state in September of 1984. Then in February, she shocked her parents and doctors when she began to speak. In her first national television interview, after undergoing surgery on her long-unused limbs and speech therapy to unlock her long-dormant tongue, Scantlin speaks with The Early Show national correspondent Tracy Smith in a two-part interview to be broadcast Thursday and Friday. Smith also speaks with Sarah's parents, Jim and Betsy Scantlin,...