A Belarussian serviceman, right, acting as a terrorist detains a man during the active stage of the 2017 Slavic Brotherhood drill in Brest, Belarus.

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A Belarussian serviceman is seen here during the active stage of the 2017 Slavic Brotherhood drill in Brest, Belarus.

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Major General Vadim Denisenko, Commander of the Belarus Army's special force, during the 2017 Slavic Brotherhood drill in Brest, Belarus.

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Belarusian serviceman land from a helicopter during the active stage of the 2017 Slavic Brotherhood drill in Brest, Belarus.

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A serviceman lands during the active stage of the 2017 Slavic Brotherhood drill in Brest, Belarus.

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A serviceman lands during the active stage of the 2017 Slavic Brotherhood drill in Brest, Belarus.

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A Russian serviceman is seen here during the active stage of the 2017 Slavic Brotherhood drill in Brest, Belarus.

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A Russian serviceman is seen here during the active stage of the 2017 Slavic Brotherhood drill in Brest, Belarus.

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Russian servicemen seen here during the active stage of the 2017 Slavic Brotherhood drill in Brest, Belarus.

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A Russian serviceman is seen here during the active stage of the 2017 Slavic Brotherhood drill at the Brestsky base in Belarus.

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