The Internet is host to a world of information and misinformation. At the Khan Academy, an online education site started by visionary Salman Khan, one can learn about such diverse subjects as whether there are different sizes of infinity, or if basketball star and regular contributor to the site LeBron James thinks it's easier to make three free throws or one three pointer. That's right; LeBron James is a regular contributor. And Bill Gates's kids are regular visitors. Find out just who Salman Khan is and how he became a superstar magnet--and a superstar in his own right.