Columbia subject headings:
Europe--Foreign relations--1989-
Europe--Foreign relations--United States.
Europe--Relations--United States.
North Atlantic Treaty Organization.
Security, International.
United States--Foreign relations--2001-2009.
United States--Foreign relations--Europe.
United States--Relations--Europe.
Harvard subject headings:
Europe--Foreign relations--1989-
Europe--Foreign relations--United States.
North Atlantic Treaty Organization
Security, International.
United States--Foreign relations--2001-2009.
United States--Foreign relations--Europe.
Princeton subject headings:
Europe--Foreign relations--1989-
Europe--Relations--United States.
North Atlantic Treaty Organization.
Security, International.
United States--Foreign relations--2001-2009.
United States--Relations--Europe.