Trump U-turns to renominate billionaire for Nasa chief

Donald Trump has renominated billionaire investor Jared Isaacman to lead NASA, reversing a decision made five months ago. Isaacman, a friend of Elon Musk and amateur astronaut who sponsored a SpaceX mission, is valued at $1.9bn. Trump's sudden change of mind and re-nomination of Isaacman to head NASA marks a departure from past administrators and requires Senate confirmation.