Borrell: Ukraine has a historic window for joining the EU. On the 20th anniversary of the largest membership increase in the history of the EU, the head of EU diplomacy, Josep Borrell, said that the current candidate countries, including Ukraine, have a histo... #EUexpansion #EuropeanIntegration #HuguesMingarelli #JosepBorrell #UkraineEU #ValdisDombrovskis