NASA astronauts briefly sheltered in their SpaceX Crew Dragon capsule on Friday during a Russian repair attempt on a leaky transfer tunnel of the International Space Station. The work was later halted for further analysis, and the crew resumed their normal tasks on the space station, which orbits about 250 miles above Earth.The cracks in the Zvezda service module's transfer tunnel, known as PrK, are the latest sign of aging infrastructure at the 26‑year‑old outpost, which has already weathered a separate coolant leak on a docked Soyuz spacecraft. These incidents have forced NASA and Russia's Roscosmos space agency to coordinate on protecting the crew and keeping the station operational.
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The PrK tunnel on Russia's Zvezda service module "has suffered from cracks and leaks for some time, and has been mitigated by Roscosmos as much as possible to date," NASA press secretary Bethany Stevens said in a statement on X. She said the cracks "have always been a concern that NASA watches very closely."
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New leaks led Roscosmos to start a more extensive structural repair on June 5, prompting NASA to direct the four Crew‑12 astronauts — Jessica Meir, Jack Hathaway, Russia's Andrey Fedyaev, and Europe's Sophie Adenot — and NASA's Chris Williams, who flew to the space station separately in November 2025, to take shelter inside the Dragon capsule as a safety precaution.
