12. Elon Musk, Tesla Motors, $20.7 billion SpaceX chief engineer Elon Musk listens to a question from the media about the progress to fly astronauts to and from the International Space Station, from American soil, as part of the agency's commercial crew program at SpaceX headquarters, in Hawthorne, Calif., Thursday, Oct. 10, 2019. (AP Photo/Alex Gallardo)
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