For the past few decades, the so-called transnationalization of the police in Europe has evolved rapidly. The resulting cooperation between national police organizations is often motivated by the need to battle against the increasingly internationally-operating organized crime and (especially since 2001) international terrorism. As a result, an amalgam of cooperation, information-exchange, and informal relations has been established between national police organizations. Europe has also tried to stimulate developments of and within the police. It may be difficult to get a realistic view on these important developments in the transnationalization of the police in Europe. Moreover, it may be difficult to get detailed and reliable information about the impact of European transnational developments on the Member States' police services. Taking these observations into account, and in view of the Belgian Presidency of the Council of Europe that will start during the second part of 2010, the