Activists of far-right Ukrainian party Right Sector rally near Ukrainian President's office on December 1, 2019 in Kiev, before a key December 9 summit in Paris aimed at ending the hostilities between Ukraine and Russia. - Ukraine's President Volodymyr Zelensky and Russia's President Vladimir Putin will take part in a December 9 summit in Paris, moderated by the leaders of France and Germany, aimed at ending more than five years of fighting between the two countries. (Photo by Sergei SUPINSKY / AFP)

Activists of far-right Ukrainian party Right Sector rally near Ukrainian President's office on December 1, 2019 in Kiev, before a key December 9 summit in Paris aimed at ending the hostilities between Ukraine and Russia. - Ukraine's President Volodymyr Zelensky and Russia's President Vladimir Putin will take part in a December 9 summit in Paris, moderated by the leaders of France and Germany, aimed at ending more than five years of fighting between the two countries. (Photo by Sergei SUPINSKY / AFP)

Activists of far-right Ukrainian party Right Sector rally near Ukrainian President's office on December 1, 2019 in Kiev, before a key December 9 summit in Paris aimed at ending the hostilities between Ukraine and Russia. - Ukraine's President Volodymyr Zelensky and Russia's President Vladimir Putin will take part in a December 9 summit in Paris, moderated by the leaders of France and Germany, aimed at ending more than five years of fighting between the two countries. (Photo by Sergei SUPINSKY / AFP)

Activists of far-right Ukrainian party Right Sector rally near Ukrainian President's office on December 1, 2019 in Kiev, before a key December 9 summit in Paris aimed at ending the hostilities between Ukraine and Russia. - Ukraine's President Volodymyr Zelensky and Russia's President Vladimir Putin will take part in a December 9 summit in Paris, moderated by the leaders of France and Germany, aimed at ending more than five years of fighting between the two countries. (Photo by Sergei SUPINSKY / AFP)

Activists of far-right Ukrainian party Right Sector rally near Ukrainian President's office on December 1, 2019 in Kiev, before a key December 9 summit in Paris aimed at ending the hostilities between Ukraine and Russia. - Ukraine's President Volodymyr Zelensky and Russia's President Vladimir Putin will take part in a December 9 summit in Paris, moderated by the leaders of France and Germany, aimed at ending more than five years of fighting between the two countries. (Photo by Sergei SUPINSKY / AFP)