TEXT: SpaceX CEO Elon Musk speaks after unveiling the Dragon V2 spacecraft in Hawthorne, California May 29, 2014. Space Exploration Technologies, or SpaceX, on Thursday unveiled an upgraded passenger version of the Dragon cargo ship NASA buys for resupply runs to the International Space Station. REUTERS/Mario Anzuoni  (UNITED STATES - Tags: POLITICS TRANSPORT SCIENCE TECHNOLOGY SOCIETY)