September 10, 2016. Russian President Vladimir Putin, right, and Moscow Mayor Sergei Sobyanin take part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day.

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September 10, 2016. Russian President Vladimir Putin, foreground center, and Moscow Mayor Sergei Sobyanin, foreground left, take part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day.

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September 10, 2016. From right: Russian President Vladimir Putin and Moscow Mayor Sergei Sobyanin take part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day.

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September 10, 2016. Russian President Vladimir Putin, right, and Moscow Mayor Sergei Sobyanin take part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day.

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September 10, 2016. Russian President Vladimir Putin, right, and Moscow Mayor Sergei Sobyanin take part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day.

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September 10, 2016. From right: Russian President Vladimir Putin and Moscow Mayor Sergei Sobyanin take part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day.

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September 10, 2016. Russian President Vladimir Putin, second right, and Moscow Mayor Sergei Sobyanin, second left, take part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day.

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September 10, 2016. Russian President Vladimir Putin, left, and Moscow Mayor Sergei Sobyanin take part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day.

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September 10, 2016. From left, bacground: Russian President Vladimir Putin and Moscow Mayor Sergei Sobyanin take part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day.

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September 10, 2016. From left. foreground: Russian President Vladimir Putin and Moscow Mayor Sergei Sobyanin takes par in the Moscow Central Ring's commissioning ceremony on Moscow's City Day. Second left: Moscow Metro Head Dmitry Pegov.

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September 10, 2016. Russian President Vladimir Putin, center, takes part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day. Left: Moscow Mayor Sergei Sobyanin. Right: Presidential Aide Igor Levitin.

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September 10, 2016. Russian President Vladimir Putin takes part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day. Left: Moscow Mayor Sergei Sobyanin.

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September 10, 2016. Russian President Vladimir Putin, second left, takes part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day. Left: Transport Minister Maxim Sokolov. Third left: Moscow Mayor Sergei Sobyanin.

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September 10, 2016. Russian President Vladimir Putin, left, takes part in the Moscow Central Ring's commissioning ceremony on Moscow's City Day. Right: Moscow Mayor Sergei Sobyanin.

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