“What Elon Musk and his colleagues have built, beyond Tesla and (Tesla subsidiary) SolarCity and the battery manufacturers is truly remarkable. They have reinvented rocketry, reduced the cost by a considerable margin and done things that nobody has ever done before. You have to be impressed by that,” Rivkin said about his visit. “It’s not just theoretical — they are the main contractor for the space station (with NASA) and doing remarkable things, so you have to take it seriously when they say, ‘We’re getting into disrupting the tunneling business. We can do it cheaper, a lot faster, and we’re willing to put our money where our mouth is.’ ”