"The September 11, 2001 terrorist attacks gave new momentum to European Union (EU) initiatives to improve law enforcement cooperation against terrorism both among its 25 member states and with the United States. Washington has largely welcomed these efforts, recognizing that they may help root out terrorist cells and prevent future attacks. However, the United States and the EU continue to face several challenges as they seek to promote closer cooperation in the police, judicial, and border control fields. This report will be updated as needed."
CRS Report for Congress, RS22030