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"It is the first time the UK has made accusations about Russian test-firing in space"

Have there been previous cases of Russian test-firing in space? [edit grammer]

Yes, Salyut 3 had either a 23mm or 30mm cannon, which was apparently test fired: https://en.wikipedia.org/wiki/Salyut_3#On-board_gun

There were also plans for a manned Soyuz based satellite interceptor armed with cannons and/or missiles but it was never flown and nothing really built: https://en.wikipedia.org/wiki/Military_Soyuz

> The US said the Russian satellite system was the same one it raised concerns about in 2018 and earlier this year

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