see more

NEW YORK, NY - SEPTEMBER 28: (AFP OUT) Russian President Vladimir Putin (L) and U.S. President Barack Obama shake hands for the cameras before the start of a bilateral meeting at the United Nations headquarters September 28, 2015 in New York City. Putin and Obama are in New York City to attend the 70th anniversary general assembly meetings. (Photo by Chip Somodevilla/Getty Images)

NEW YORK, NY - SEPTEMBER 28:  (AFP OUT)  Russian President Vladimir Putin (L) and U.S. President Barack Obama shake hands for the cameras before the start of a bilateral meeting at the United Nations headquarters September 28, 2015 in New York City. Putin and Obama are in New York City to attend the 70th anniversary general assembly meetings.  (Photo by Chip Somodevilla/Getty Images)

see more

MOSCOW, RUSSIA - DECEMBER 28, 2016: Russia's President Vladimir Putin (C) chairs a meeting of the Russian Security Council at the Moscow Kremlin. Mikhail Klimentyev/Russian Presidential Press and Information Office/TASS (Photo by Mikhail Klimentyev\TASS via Getty Images)

MOSCOW, RUSSIA - DECEMBER 28, 2016: Russia's President Vladimir Putin (C) chairs a meeting of the Russian Security Council at the Moscow Kremlin. Mikhail Klimentyev/Russian Presidential Press and Information Office/TASS (Photo by Mikhail Klimentyev\TASS via Getty Images)

see more

ANTALYA, TURKEY - NOVEMBER 15: (L-R) Indian Prime Minister Narendra Modi, Russian President Vladimir Putin and US President Barack Obama arrive for a family photo during the G20 Turkey Leaders Summit on November 15, 2015 in Antalya, Turkey. (Photo by Aykut Unlupinar/Anadolu Agency/Getty Images)

ANTALYA, TURKEY - NOVEMBER 15:  (L-R) Indian Prime Minister Narendra Modi, Russian President Vladimir Putin and  US President Barack Obama arrive for a family photo during the G20 Turkey Leaders Summit on November 15, 2015 in Antalya, Turkey. (Photo by Aykut Unlupinar/Anadolu Agency/Getty Images)