Why did they make such a mistake,dont they know people will take pictures and of course ridicule them?To be fair they brought prototype instead of the serial produced su-57 to that airshow. I think next year the Su-75 will be showcased at airshows
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"The first flight of the Checkmate will take place in 2024, Head of the Ministry of Industry and Trade Denis Manturov said in a [March 2023] interview with Interfax."
International Airshow,you send the best!