Elon Musk's SpaceX has carried out the sixth test launch of its Starship rocket, with US president-elect Donald Trump joining Musk in Texas to watch the flight. The launch was a success but the company was unable to pull off a repeat of its fifth test where giant robot arms caught the rocket's booster as it fell back to the launchpad, preventing damage and allowing for reuse. SpaceX opted instead for a fiery splashdown in the Gulf of Mexico