Scrapping the Schengen Agreement in the face of terrorism would be to give in to the terrorists. The Agreement is part of the open, free society which the extremists are attacking, with its aim of cooperation between different nationalities and the development of a peaceful European identity. Retreating behind national borders would only encourage them in their attacks, and would be ineffective in seeking to prevent future violence. Investigation of attacks in Madrid, London and Paris have all revealed that the terrorists were legal residents, free to come and go regardless of border restrictions. Rather than dissolving Schengen the solution to terrorism lies in better intelligence gathering and cooperation between states (not likely to be encouraged by a retreat behind national borders), and by addressing the problems of alienation and poverty within our societies which serve as breeding grounds for extremism.