Leaks are affecting a key part of the International Space Station. NASA and Russia’s space agency, Roscosmos, are not seeing eye to eye about the level of risk.

The agency’s top medical official was responding to rumors that Suni Williams had lost an unusual amount of weight during an extended stay in orbit.

A recent report out last month from NASA’s Office of the Inspector General highlighted some of the big challenges to keeping the ISS flying safely until 2030.

The multinational effort to assemble the station was a huge success, and the ISS has avoided any major incidents thanks to careful management and maintenance. But it is getting old, and the cracks are beginning to show—literally.

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