Nasa’s administrator Jared Isaacman on Wednesday defended the make-up of the space agency’s latest Artemis crew, an all-male group. The nominations have earned criticism that Nasa may have acted in accordance with US President Donald Trump’s direction to eliminate diversity and inclusion efforts. Isaacman insisted in a lengthy social media post that the “crew selection does not involve any political appointees”. “The Astronaut Office assigns the crew that gives the mission the best chance of...