Marina Kostić, Research Associate at Institute of International Politics and Economics, participated in the fifth Warsaw Security Forum, held on 24–25 October 2018 in Warsaw, Poland. The Forum was attended by a significant number of political leaders from Europe, Asia and the United States, as well as representatives of security and defence industry, academic institutions and non-governmental organisations. This year, Warsaw Security Forum dealt with current issues of contemporary international relations, especially with relations between great powers, European security, and the contribution of Central and Eastern Europe to European security.