Clearly, its oil. After controlling the pipeline between Middle East and China, it's only natural for Bush and his dogpound to want to take over the South American continent. Modern colonization at work. It'll only be a matter of time before the world kowtows to the "might" of USA.
Finally, Bush will be able to complete what Hitler had only managed to dream of. To rule the world. As an American, Mike Ruppert, quoted, "The Third Reich did not end in World War II. It simply changed venue." The only superpower that was able to match the Americans, the USSR, was practically annihilated economically by the Americans.
More on Mike Ruppert and his theories can be found in this website.
www.copvcia.com. Interestingly, you may find that oil may not only be the only item on the US's agenda for wanting to control the South American continent...
To further reiterate my point of America seeking global domination, do reach for the book, The Grand Chessboard by Zbigniew Brzezinski