A billionaire and an engineer have become the first non-professional crew to perform one of the riskiest manoeuvres in space - a spacewalk. Jared Isaacman and Sarah Gillis stepped out of the SpaceX spacecraft around 15 minutes apart, starting at 11:52BST, wearing specially-designed suits. "Back at home we all have a lot of work to do, but from here Earth sure looks like a perfect world," Mr Isaacman said as he exited. It was commercially funded by Mr Isaacman. Before, only astronauts...