(L-R) Bulgarian Prime Minister Boyko Borissov, European Union President Donald Tusk, Turkish President Recep Tayyip Erdogan and European Commission chief Jean-Claude Juncker pose for a photo after their joint news conference - part of the EU-Turkey summit - in Varna on March 26, 2018. / AFP PHOTO / DIMITAR DILKOFF        (Photo credit should read DIMITAR DILKOFF/AFP/Getty Images)
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