Columbia subject headings:
Harvard subject headings:
Africa, Northeast--Foreign relations--United States.
Africa, Northeast--Strategic aspects.
Horn of Africa--Foreign relations--United States.
Horn of Africa--Strategic aspects.
United States--Foreign relations--Africa, Northeast.
United States--Foreign relations--Horn of Africa.
Princeton subject headings:
Africa, Northeast--Foreign relations--United States.
Africa, Northeast--Strategic aspects.
United States--Foreign relations--Africa, Northeast.