Interesting article that talks about the total net worth of the US and then divides that by the price of oil. It turns out that 400 billion barrels of oil would buy the entire US. Saudi Arabia and Iran have just enough proven reserves to cover it.
http://articles.moneycentral.msn.com/Investing/Extra/HowMuchOilItdTakeToBuyTheUS.aspx
If only oil wasn’t such a valuable natural resource and we had other alternatives. Oh, and then there is the whole issue of how broke the US is……..