Cliff’s notes: Polaris Dawn splashes down near Key West with something rare- a 100% successful mission with no surprises. It was risky, especially the preparation and execution of the spacewalk. You can’t treat decompression sickness on the Dragon capsule, so you have to make sure that no one in the crew of 4 has any nitrogen bubbles in their blood before venting the air and letting SPAAAACE into your spacecraft.