This four page post from Belmont Club (including some charts and graphs) is very much worth reading. Consider what is happening in Saudi Arabia. Are terrorists trying to overthrow the regime? Or, do they have something even more mischievious in mind; possibly wanting to disrupt the flow of oil? (I hasten to add that both can be done at once). Belmont Club shows that Asia is even more dependent on oil from the Persian Gulf than we are (see the charts). Also, and especially, note the listing of "choke points" (Bab el-Mandab, Bosporus, etc.) that are vulnerable to terrorist attacks and taking out any of them would not be good. "Except for the Russian oil pipelines and the Panama Canal, which has been excluded from this list, nearly all the oil chokepoints are in regions where groups like Al Qaeda can be expected to operate. But although the dependence on oil is global, the defense of these strategic corridors has not been internationalized."