Western Africa seems like the place to be for large mining and steel businesses, such as: Vale ADR (VALE) Rio Tinto ADR (NYSE:RTP) BHP Billiton ADR (NYSE:BHP) ArcelorMittal ADR (NYSE:MT) Aluminum Corp of China or Chinalco ADR (NYSE:ACH) Russian steel company, Severstal These six companies plan to spend billions of dollars in Guinea, Liberia and Sierra Leone – where some of the ...