NASA's human spaceflight chief resigns days before crewed launch

Doug Loverro, NASA's human spaceflight programme head, has resigned days before its crewed launch in collaboration with SpaceX. Ken Bowersox, NASA's deputy associate administrator for human exploration and a former astronaut, will be taking over after Loverro. NASA and SpaceX will be launching two astronauts in SpaceX's Crew Dragon spacecraft atop Falcon 9 rocket on May 27.