Roscosmos and NASA are the principal partners in the ISS. They continue to collaborate for policy and technical reasons (the ISS cannot be broken apart, for example) in the wake of the internationally condemned Russian invasion of Ukraine in 2022, which severed most international space relationships with Russia.

For the past five years, air has been escaping through a Russian section of the International Space Station (ISS) at an increasing rate. NASA and its Russian counterpart, Roscosmos, are still in disagreement over the root cause of the leak, as well as the severity of the consequences.

NASA and Russia's Roscosmos cannot agree on how dangerous the leaks in the Zvezda module may be to the station. While Russia believes the risk is low, NASA is reportedly concerned the leaks could lead to a catastrophic structural failure.