Columbia subject headings:
Bush, George W. (George Walker), 1946-
Obama, Barack.
Persian Gulf Region--Relations--United States.
United States--Foreign relations--21st century.
United States--Relations--Persian Gulf Region.
Harvard subject headings:
Bush, George W. (George Walker), 1946-
Obama, Barack
Persian Gulf Region--Relations--United States.
United States--Foreign relations--21st century
United States--Relations--Persian Gulf Region.
Princeton subject headings:
Bush, George W. (George Walker), 1946-
Obama, Barack.
Persian Gulf Region--Relations--United States.
United States--Foreign relations--21st century.
United States--Relations--Persian Gulf Region.