That article is reflecting the writer opinion or rather his political standing(views) in regard with Obama
Now I don't see Forbes being sued over defamation libel.
It's important to be and to stay critical when you read something. It doesn't mean one has to be a skeptic but to remain objective. Because exaggerated interpretation of facts and twisted truth may be imbedded to force a certain view to be favored by the readers. And lots of what is written is a matter of mere personal opinion.
For one Wiki tells US only has oil reserve that would last a mere 8 years when exploited.
Now oil is depleting and depleting fast. 21st century will be known to be the end of oil age. Oil prices are going to go sky rocketing before the world really exhausts all of its oil reserves. And what do you think would happen after that if US military equipments, ships, planes and other military machines are deprived of oil not to mention the state of the economy and civilian in general? Those 8 years worth of oil reserve would be crucial to extend US dominance and control for some years before another source of energy can be made reliable.
US has already got enough oil supply from the Saudis, Kuwait and now potentially Iraq so why would it need to steal some more oil from Brazilian coast? There's no free lunch in this world so I'm sure US got something back in return for the financial aid.
You're lucky that you have almost all of your oil reserve unexploited.
In my third world country the people are put under pressure with the increasing oil prices with so little of our average income and the government is already talking about limiting certain oil consumption because it can no longer afford to maintain its subsidy. For heaven sake though we are producing much natural gas, we are having difficulty fulfilling local demands because much of the gas goes to China and Japan for a very low price and over extended period of contract. As far as I know much of the domestic oil gets refined in Singapore and got imported back.