This special edition of Focus on Europe comes to you from Belfast, where we look at the EU's borders. With Brexit looming, a hard Irish border could be reintroduced. But we also take you to places where borders are disappearing or being secured. Residents of the Greek island of Samos are divided on how to deal with the overcrowded refugee camp on their doorstep. The heroes of Poland's Solidarity movement reflect on the end of the Communist era and how their country has changed since.