Columbia subject headings:
World politics--1995-2005.
Harvard subject headings:
European Union countries--Foreign relations--United States.
September 11 Terrorist Attacks, 2001.
United Nations
United States--Foreign relations--European Union countries.
World politics--21st century
Princeton subject headings:
European Union countries--Foreign relations--United States.
September 11 Terrorist Attacks, 2001.
United Nations.
United States--Foreign relations--European Union countries.
World politics--21st century.