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SOCHI, RUSSIA - MAY 2: German Chancellor Angela Merkel (L) and Russian president Vladimir Putin (R) shake hands during a press conference after their meeting in Sochi, Russia on May 2, 2017. (Photo by Nataliy Zemboska/Anadolu Agency/Getty Images)

SOCHI, RUSSIA - MAY 2: German Chancellor Angela Merkel (L) and Russian president Vladimir Putin (R) shake hands during a press conference after their meeting in Sochi, Russia on May 2, 2017.
 (Photo by Nataliy Zemboska/Anadolu Agency/Getty Images)

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Russian President Vladimir Putin and German Chancellor Angela Merkel give a press conference following their meeting at the Bocharov Ruchei state residence in Sochi on May 2, 2017. / AFP PHOTO / Alexander NEMENOV (Photo credit should read ALEXANDER NEMENOV/AFP via Getty Images)

Russian President Vladimir Putin and German Chancellor Angela Merkel give a press conference following their meeting at the Bocharov Ruchei state residence in Sochi on May 2, 2017. / AFP PHOTO / Alexander NEMENOV        (Photo credit should read ALEXANDER NEMENOV/AFP via Getty Images)

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SOCHI, RUSSIA - MAY 2: German Chancellor Angela Merkel (L) and Russian president Vladimir Putin (R) hold a press conference after their meeting in Sochi, Russia on May 2, 2017. (Photo by Nataliy Zemboska/Anadolu Agency/Getty Images)

SOCHI, RUSSIA - MAY 2: German Chancellor Angela Merkel (L) and Russian president Vladimir Putin (R) hold a press conference after their meeting in Sochi, Russia on May 2, 2017.
 (Photo by Nataliy Zemboska/Anadolu Agency/Getty Images)

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SOCHI, RUSSIA - MAY 2: German Chancellor Angela Merkel and Russian president Vladimir Putin (not seen) hold a press conference after their meeting in Sochi, Russia on May 2, 2017. (Photo by Nataliy Zemboska/Anadolu Agency/Getty Images)

SOCHI, RUSSIA - MAY 2: German Chancellor Angela Merkel and Russian president Vladimir Putin (not seen) hold a press conference after their meeting in Sochi, Russia on May 2, 2017.
 (Photo by Nataliy Zemboska/Anadolu Agency/Getty Images)

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SOCHI, RUSSIA - MAY 2: German Chancellor Angela Merkel (L) meets Russian president Vladimir Putin (R) in Sochi, Russia on May 2, 2017. (Photo by Nataliy Zemboska/Anadolu Agency/Getty Images)

SOCHI, RUSSIA - MAY 2: German Chancellor Angela Merkel (L) meets Russian president Vladimir Putin (R) in Sochi, Russia on May 2, 2017.
 (Photo by Nataliy Zemboska/Anadolu Agency/Getty Images)