Security in EU remains an issue

It's been two years since the peak of Europe's refugee crisis, but some countries in the European Union say security remains an issue. Attitudes to the Schengen zone - previously one of the bloc's central pillars - have also changed.

Hungarian Prime Mini Orban (C) arrives on the second day of the European Council meeting in Brussels, Belgium, 15 December 2017. EPA/STEPHANIE LECOCQ Source: EPA