At the age of 31, Facebook Founder Mark Zuckerberg is one of the richest men in the world. Now he wants to invest in the future. He and his wife have pledged $45 billion to improve education, cure disease, connect people and build strong communities. It's a form of "impact investing" that supporters call the future of charity. Skeptics say it's a way of escaping taxes and increasing political power. We hear from both sides and look at what happened to Zuckerberg's earlier effort to reform public schools in Newark, New Jersey.