A Russian serviceman attends an opening ceremony of the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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Foreign guests attend an opening ceremony of the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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Chief of the General Staff of the Russian armed forces, Valery Gerasimov and Deputy Prime Minister Yuri Borisov attend an opening ceremony of the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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People pass by the stall of Russian space agency Roscosmos during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A Russian flag flutters behind a barrel of an armoured vehicle on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A man explores the full scale model of the first Soviet nuclear bomb RDS-1 during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A man checks an AK-12 assault rifle at the Kalashnikov Concern's stall during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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Visitors explore exhibits on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A man checks a PPK-20 submachine gun at the Kalashnikov Concern's stall during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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Russian servicemen check an ASVKM army sniper rifle on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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Russian servicemen check an ASVKM army sniper rifle on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A Vazar Dux electric motorcycle is on display is on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A visitor explores a stall of the Shvabe Holding, a part of Russian state-owned high-tech conglomerate Rostec, during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A woman experiences a flight simulator during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A Vityaz-D autonomous underwater vehicle by Central Design Bureau for Marine Engineering (Rubin) is on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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Visitors explore exhibits on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A mannequin wearing a military uniform is on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A person dives with scuba equipment during demonstration at the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A Russian serviceman stands next to an antiaircraft gun on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A Chinese serviceman explores samples of military equipment on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A Chinese serviceman takes pictures during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A tank helmet is seen on the gun barrel of a 2S4 Tyulpan (Tulip) self-propelled mortar on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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Russian servicemen stand next to samples of military equipment on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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A Zu-23 antiaircraft gun is on display during the Iternational military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.

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