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.

A section of the Russian-controlled International Space Station (ISS) has been leaking for several years, letting pressure and air escape. The leak has recently gotten worse, raising questions about both the crew’s safety and the orbiting laboratory’s long-term sustainability.

The dispute is about a small yet persistent leak in the vestibule of the Zvezda service module called PrK, which separates a docking port from the rest of the module.

NASA has concerns about the structural integrity of the Russian module and the "possibility of a catastrophic failure," per ISS Advisory Committee chair Bob Cabana

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