Columbia subject headings:
Harvard subject headings:
Korea (North)--Foreign relations--United States.
Nuclear weapons--Korea (North)
United States--Foreign relations--Korea (North)
Princeton subject headings:
Korea (North)--Foreign relations--United States.
Korea (South)--Politics and government--1988-2002.
Nuclear weapons--Korea (North)
United States--Foreign relations--2001-.
United States--Foreign relations--Korea (North)