The five-day Polaris Dawn flight marked the fifth private mission for SpaceX's Crew Dragon capsule. It was also the company's most ambitious expedition, as the crew members and their spacecraft executed several risky maneuvers.
Chief among them was the all-civilian spacewalk that took place on Thursday. Isaacman and Gillis exited the Dragon capsule on a tether, each spending around 10 minutes out in the vacuum of space. The duo spent the spacewalk conducting mobility tests in their newly designed spacesuits.