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A nuclear-powered Type 094A Jin-class ballistic missile submarine of the Chinese People’s Liberation Army Navy during a military exercise in the South China Sea in 2018.

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Russian President Vladimir Putin addresses the nation at the Novo-Ogaryovo state residence outside Moscow on April 2, 2020.

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Fireworks are seen over the Washington Monument on Saturday, July 4, 2020.

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Chinese soldiers applaud during a military parade at the Zhurihe training base in China's northern Inner Mongolia region on July 30, 2017

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Riot police hold up a warning flag during a demonstration in a mall on July 6, 2020 in Hong Kong, China.

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President of the Ford Foundation and recipient of Sundance Institute's Vanguard Award for Philanthropy Darren Walker speaks during 2020 Sundance Film Festival - An Artist At The Table Presented By IMDbPro Dinner & Reception at Juniper at Newpark on Januar

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Russia's President Vladimir Putin visits the Russian Navy corvette Gremyashchy at the Yantar Shipyard in the city of Kaliningrad

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Photojournalist Helen Johns Kirtland in a trench during World War I.