more specifically, osteosarcoma. usually strikes people much younger than bruce.e was scared. >> my first thought was he's going to die. >> there's never a moment that is not shadowed in some way by that phone call. that cancer illness, the idea of dying, is never that far away. >> reporter: just days after the diagnosis, cape cod. bruce was consumed by a sense of loss. a man who had made a living by walking knew he might never walk again, might not live to see the twins grow up. his thoughts focused on them. >> i'm a person who has tried in my life to dream undreamable dreams. who's going to teach them how to dream? who is the person i'm going to say, tell them if they want to run a marathon, open a restaurant, write a book, cook the hardest souffle. who is going to say to them, you can do it? >> reporter: after a restless night in the early morning darkness, the house quiet, the answer came to him. the extraordinary idea when we come back. [ grunts ] [ male announcer ] built like a volkswagen. the 2011 tiguan. [ grunts ] and all we need to do is change the way w