Deputy Prime Minister for European and Euro-Atlantic Integration of Ukraine Dmytro Kuleba has said Ukraine on its course toward acquiring NATO membership needs to strengthen its security by bringing it in line with NATO standards and achieving interoperability with the Alliance.

"Interoperability should be deep and involve not only certain military command processes or weapon standards. In other words, Ukrainian officers need to drink whiskey more often with their colleagues from NATO countries than other alcoholic drinks with those from countries outside the Alliance," he told the Ukrainian media outlet European Pravda on September 27.

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Kuleba also noted reforms in security and defense sectors as the most challenging ones in the context of the country's accession to NATO. However, the situation is not dramatic, he said.