Report by Jan Wouters & Frederik Naert from the Institute for International Law, Leuven University (Belgium).

Extensive analysis of EU measures after 11 September, with excellent references to sources,focussed on the development of the framework decisions on terrorism andthe European arrest warrant (both adopted June 13, 2002).They conclude: "The EU has reacted to the September 11 events by fairly quickly adopting an impressive number of measures, in many policy areas. It has achieved the most progress in the field of cooperation in criminal matters, although the jury is still out on whether the measures adopted will all be effectively implemented and vigilance will be required to ensure overall consistency and continuing respect for human rights, democratic oversight and the rule of law."

The European Union and 'September 11' (January 2003)
http://www.law.kuleuven.ac.be/iir/WP/WP40e.pdf