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A man and his son play on the beach of the Caspian Sea in Tonekabon City, northern Iran, Feb. 7, 2020. (Photo by Ahmad Halabisaz/Xinhua)
A man and his son play on the beach of the Caspian Sea in Tonekabon City, northern Iran, Feb. 7, 2020. (Photo by Ahmad Halabisaz/Xinhua)