Elon Musk's SpaceX saw mixed results in the latest test launch of its Starship mega-rocket Thursday, successfully catching the massive booster but with the upper stage failing for the second consecutive time. Minutes after liftoff and booster separation, a video live feed showed the upper stage tumbling uncontrollably, with signal soon cutting out. The new setback could fuel questions over Musk's attention to his space company, as the billionaire spends most of his time in Washington leading President Donald Trump's government overhaul efforts. That work has also prompted mounted scrutiny over Musk's influence on the US government space program.