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NASA’s SpaceX Crew-3 astronauts participate in a countdown dress rehearsal at the agency’s Kennedy Space Center in Florida on Oct. 28, 2021, to prepare for the upcoming Crew-3 launch. From left are Matthias Maurer, with the European Space Agency, and NASA astronauts Tom Marshburn, Raja Chari, Crew-3 commander, and Kayla Barron. They are inside the crew access arm leading to the company’s Crew Dragon spacecraft during the rehearsal. The four-person crew will launch aboard the Crew Dragon atop the Falcon 9 on Oct. 31 to the International Space Station. Launch is targeted for 2:21 a.m. EDT from Pad 39A. Crew-3 is the third crew rotation flight to the space station for NASA’s Commercial Crew Program, and the first flight of a new Crew Dragon spacecraft.