Mil Mi-26 heavy transport helicopter and Mi-8 medium multi-role helicopter perform during a demonstration flight at the MAKS 2017 air show in Zhukovsky, outside Moscow, Russia, July 18, 2017. (Photo/Agencies)
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Mil Mi-26 heavy transport helicopter and Mi-8 medium multi-role helicopter perform during a demonstration flight at the MAKS 2017 air show in Zhukovsky, outside Moscow, Russia, July 18, 2017. (Photo/Agencies)
