Columbia subject headings:
Harvard subject headings:
Drug traffic--United States
Petroleum industry and trade--United States
Political corruption--United States
September 11 Terrorist Attacks, 2001.
United States--Foreign relations--2001-2009.
United States--Politics and government--2001-2009
Princeton subject headings:
Drug traffic--United States.
Petroleum industry and trade--United States.
Political corruption--United States.
September 11 Terrorist Attacks, 2001.
United States--Foreign relations--2001-2009.
United States--Politics and government--2001-2009.