Good link - potential problem when considering this in tandem with M.E. conflicts and our "Hugo problem" down south - here is the intro teaser to the article:

Blood Oil

Could a bunch of Nigerian militants in speedboats bring about a U.S. recession? Blowing up facilities and taking hostages, they are wreaking havoc on the oil production of America's fifth-largest supplier. Deep in the Niger-delta swamps, the author meets the nightmarish result of four decades of corruption...