Nasa needs saving from itself – but is this billionaire right for that job?

BBCBillionaire businessman Jared Isaacman has a big vision for the future of humanity. He set off on his first mission to space in 2021 – a private journey he paid an estimated $200m (£160m) for – and announced that he wanted space travel to be for the masses, not only for the 600 who have experienced it to date – most of them professional astronauts employed by Nasa and the wealthy."We want it to be 600,000," he…