Russia has threatened to ban the US from using its spacecraft to access the International Space Station (ISS), in retaliation for a series of sanctions imposed over the crisis in Ukraine.
The two former Cold War rivals have collaborated on the project since the end of the “space race” despite their differences over foreign policy, but relations have deteriorated spectacularly since the annexation of Crimea into the Russian federation.
Issuing a series of tweets and later a full press conference, Russia’s deputy prime minister Dmitry Rogozin said that his country would withdraw its cooperation on the ISS after the current agreement expires in 2020.
Mr Rogozin also tweeted that Russia would stop exporting its advanced rocket engines to the US unless it received a clear commitment that they would not be used to launch military satellites.
He later told journalists: “We are very concerned about continuing to develop high-tech projects with such an unreliable partner as the United States, which politicises everything.”
The US has previously said it is interested in extending the $100 billion (£60 billion) ISS project until at least 2024, but following the crisis in Ukraine has joined with the EU in imposing a series of trade sanctions and asset freezes on companies and individuals linked to President Vladimir Putin.
Mr Rogozin said Moscow was planning “strategic changes” in its space industry after 2020 and aims to use money and “intellectual resources” that now go to the space station for a “project with more prospects”.
He suggested Russia could use the station without the US, saying: “The Russian segment can exist independently. The US one cannot."
Nasa, which is currently working with private companies in the hope of restoring a US shuttle system by 2017, downplayed the comments coming from Moscow.
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