NASA astronauts Jessica Watkins, left, Robert Hines, second from left, Kjell Lindgren, second from right, and ESA (European Space Agency) astronaut Samantha Cristoforetti, right, are seen on a monitor in firing room four of the Rocco A. Petrone Launch Control Center as they walk out of the Neil A. Armstrong Operations and Checkout Building during a dress rehearsal in preparation for the launch of a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft on NASA’s SpaceX Crew-4 mission, Wednesday, April 20, 2022, at NASA’s Kennedy Space Center in Florida. NASA’s SpaceX Crew-4 mission is the fourth crew rotation mission of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the International Space Station as part of the agency’s Commercial Crew Program. Lindgren, Hines, Watkins, and Cristoforetti are scheduled to launch on April 23 at 5:26 a.m. EDT, from Launch Complex 39A at the Kennedy Space Center. Photo Credit: (NASA/Joel Kowsky)