From PayPal to Space and beyond...

Elon Musk, 33, is chief executive of Space Exploration Technologies, a company he founded three years ago with $100 million of his own cash. ...For now, the company has four separate contracts, worth $35 million, for its first four launches. The company says it's in talks for three more launches, worth $50 million. And on April 18, the Air Force signed with SpaceX for a series of launches that could be worth $100 million. That's $185 million lined up for a firm that hasn't even done one.