In this frame grab taken from video provided by Russian Defense Ministry Press Service on Tuesday, Sept. 11, 2018, Russian armored personnel carriers roll during the military exercises in the Chita region, Eastern Siberia, during the Vostok 2018 exercises in Russia. Russia's military chief of staff says that the military exercises expected to be the biggest in three decades, will involve nearly 300,000 troops. (Russian Defense Ministry Press Service pool photo via AP)

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