The second stage of SpaceX’s Falcon 9 rocket is being loaded with liquid oxygen, and everything remains on track for a targeted 9:03 p.m. EST liftoff. Inside the Crew Dragon spacecraft are NASA astronauts Raja Chari, Tom Marshburn, Kayla Barron, and Matthias Maurer. This will be the third spaceflight for Marshburn and the first for Chari, Barron, and Maurer.