The four astronauts of Artemis II say their mission gave the world a sense of hope and unity at a time when both feel in short supply. At their first Nasa news conference since returning last Friday, Reid Wiseman, Victor Glover, Christina Koch and Jeremy Hansen said they left as friends and came back as something closer - bound by an experience that no earthly language can fully contain. More than the technical milestones, the mission reminded them of what being human actually means: laughter,