“It never crossed our minds to deny a visa to any US astronaut who was on his way to Star City to prepare for space flight.

What the US authorities have done with the entry visa of our cosmonaut is a dangerous precedent for cooperation on the International Space Station,” Rogozin wrote on Telegram.

Earlier, the United States authorities refused to issue a visa to cosmonaut Chub without explanation.

Rogozin announced his intention to request NASA's position after the incident.

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