Polish president Andrzej Duda welcomes President of Ukraine Petro Poroshenko in the presidential palace in Warsaw, Poland on 02 December 2016. (Photo by Krystian Dobuszynski/NurPhoto via Getty Images)
Polish president Andrzej Duda welcomes President of Ukraine Petro Poroshenko in the presidential palace in Warsaw, Poland on 02 December 2016. (Photo by Krystian Dobuszynski/NurPhoto via Getty Images)