Expedition 71 backup crew members, Roscosmos cosmonaut Ivan Vagner, left, NASA astronaut Don Pettit, right, and backup Belarus spaceflight participant Anastasia Lenkova, and are seen as the Soyuz rocket is rolled out by train to the launch pad at Site 31, Monday, March 18, 2024, at the Baikonur Cosmodrome in Kazakhstan. Expedition 71 NASA astronaut Tracy Dyson, Roscosmos cosmonaut Oleg Novitskiy, and Belarus spaceflight participant Marina Vasilevskaya are scheduled to launch aboard their Soyuz MS-25 spacecraft on March 21. Photo Credit: (NASA/Bill Ingalls)

jsc2024e018308 (March 6, 2024) --- Soyuz MS-25 backup and prime crew members are pictured before departing the Gagarin Cosmonaut Training Center in Star City, Russia, for the Baikonur Cosmodrome in Kazakhstan. From left are, backup crew members NASA astronaut Don Pettit, Roscosmos cosmonaut Ivan Vagner, and Belarus spaceflight participant Anastasia Lenkova, and prime crew members Roscosmos cosmonaut Oleg Novitskiy, Tracy Dyson, and Belarus spaceflight participant Marina Vasilevskaya. Credit: GCTC

jsc2024e016942 (Feb. 28, 2024) --- Soyuz MS-25 backup crew members (from left) Don Pettit from NASA, Ivan Vagner from Roscosmos, and Belarus spaceflight participant Anastasia Lenkova are pictured in their Sokol Launch and entry suits arriving for crew qualification exams at the Gagarin Cosmonaut Training Center in Star City, Russia. Credit: GCTC/Roscosmos