SPACE: Tech billionaire Jared Isaacman made the first private spacewalk today, testing out Elon Musk-owned SpaceX spacesuits on a chartered flight, but he refused to disclose how much he had invested in the trip.

After the chief executive of a credit card processing company had finished his spacewalk, it was the turn of SpaceX engineer Sarah Gillis, with the elite stunt lasting a total of two hours.