There's a longtime businessman who shares the benefits of his experience with new entrepreneurs. A stay-at-home mother who, after receiving a terrible diagnosis, decided to help others in the same situation. An Army veteran who reaches out to other veterans who are suffering. A lifelong activist who is improving the lives of people in one of the poorest parts of the world. They come from different backgrounds, serve different populations, have different motivations and goals. But these four individuals have one thing in common: They saw a need and decided they'd be the ones to step up and fill it.