NASA's human spaceflight chief has resigned a week before SpaceX is supposed to launch its first astronauts for the agency

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• Doug Loverro, who led NASA's human spaceflight division, has resigned after just six months on the job.
• Loverro quit just a week before SpaceX is scheduled to launch its first passengers — two NASA astronauts — on a mission called Demo-2.</l…

  NASA's human-spaceflight chief resigns a week before SpaceX is...