U.S. – EU Cooperation Against Terrorism

The September 11, 2001, terrorist attacks on the United States and the subsequent revelation of Al Qaeda cells in Europe gave new momentum to European Union (EU) initiatives to combat terrorism and improve police, judicial, and intelligence cooperation among its member states.

Other deadly incidents in Europe, such as the Madrid and London bombings in 2004 and 2005 respectively, injected further urgency into strengthening EU counter terrorism capabilities and reducing barriers among national law enforcement authorities so that information could be meaningfully shared and suspects apprehended expeditiously. Among other steps, the EU has established a common definition of terrorism and a common list of terrorist groups, an EU arrest warrant, enhanced tools to stem terrorist financing, and new measures to strengthen external EU border controls and improve aviation security.

As part of its drive to bolster its counter terrorism capabilities, the EU has also made promoting law enforcement and intelligence cooperation with the United States a top priority. Washington has largely welcomed these efforts, recognizing that they may help root out terrorist cells both in Europe and elsewhere, and prevent future attacks against the United States or its interests abroad.

U.S.-EU cooperation against terrorism has led to a new dynamic in U.S.-EU relations by fostering dialogue on law enforcement and homeland security issues previously reserved for bilateral discussions. Contacts between U.S. and EU officials on police, judicial, and border control policy matters have increased substantially since 2001. A number of new U.S.-EU agreements have also been reached; these include information-sharing arrangements between the United States and EU police and judicial bodies, two new U.S.-EU treaties on extradition and mutual legal assistance, and accords on container security and airline passenger data. In addition, the United States and the EU have been working together to curb terrorist financing and to strengthen transport security. Nevertheless, some challenges persist in fostering closer U.S.-EU cooperation in these fields.

Among the most prominent and long-standing are data privacy and data protection issues. The EU considers the privacy of personal data a basic right and EU rules and regulations strive to keep personal data out of the hands of law enforcement as much as possible. Over the years, the negotiation of several U.S.-EU information-sharing agreements, from those related to tracking terrorist financial data to sharing airline passenger information, has been complicated by EU concerns about whether the United States could guarantee a sufficient level of protection for European citizens’ personal data. EU worries about U.S. data protection safeguards and practices have been further heightened by the public revelations in June 2013 of U.S. National Security Agency (NSA) surveillance programs and news reports alleging that U.S. intelligence agencies have monitored EU diplomatic offices and computer networks. Other issues that have led to periodic tensions include detainee policies, differences in the U.S. and EU terrorist designation lists, and balancing measures to improve border controls and border security with the need to facilitate legitimate transatlantic travel and commerce.

Congressional decisions related to improving border controls and transport security, in particular, may affect how future U.S.-EU cooperation evolves. In addition, given the European Parliament’s growing influence in many of these policy areas, Members of Congress may be able to help shape Parliament’s views and responses through ongoing contacts and the existing Transatlantic Legislators’ Dialogue (TLD). This report examines the evolution of U.S.-EU counter terrorism cooperation and the ongoing challenges that may be of interest in the 113th Congress.

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