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A supersonic passenger plane Tu-144 is seen during the opening day of the International Aviation and Space Salon MAKS 2019 in Moscow, Russia, on Aug. 27, 2019. The air show kicked off on Tuesday. (Xinhua/Evgeny Sinitsyn)
A supersonic passenger plane Tu-144 is seen during the opening day of the International Aviation and Space Salon MAKS 2019 in Moscow, Russia, on Aug. 27, 2019. The air show kicked off on Tuesday. (Xinhua/Evgeny Sinitsyn)