On 27 May 2005, seven European Union Member States (Austria, Belgium, France, Germany, Luxembourg, the Netherlands and Spain) sign a treaty in Prüm that aims to step up cross-border cooperation, particularly to combat terrorism, cross-border crime and illegal immigration. The Prüm Convention is also known as ‘Schengen III’. The photo, taken on 3 August 2010 in Ghisonaccia, Corsica, shows Italian and German police officers working with their French colleagues.