The Many Identities of Elon Musk
Elon Musk's ultimate plan for SpaceX is to build rockets that will be capable of carrying humans to Mars. By 2030, he hopes to go himself. His chief concern, in fact, is that by the time humanity is ready to go to Mars, he will be too old. "I don't want to be doddering around up there, needing a quadruple bypass," he says.