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SpaceX CEO Elon Musk

SpaceX CEO Elon Musk introduces SpaceX's Dragon V2 spacecraft, the companys next generation version of the Dragon ship designed to carry astronauts into space, at a press conference in Hawthorne, California, May 29, 2014. The private spaceflight company's unmanned Dragon spacecraft has been...

ROBYN BECK / AFP/Getty Images
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