Try to analyze the situation in todays political realities and not those of the recent past. The US due to new technologies is self sufficient in oil. Even if it were not, oil exporters are desperate for hard currency and will sell to anyone with the means to pay for it. Otherwise their economies collapse and they experience severe political instability. That includes Iran . Can you imagine them closing the Persian Gulf and telling China that there will be no more exports of oil or the price will thanks to them skyrocket? If they ever tried to close the Gulf it would mark the beginning of the end of the bizarre mullah regime. Yet let it be the world and those with the greatest vested interests to shed blood and treasure. Over the last sixty years American involvement in the region has been costly in human and material resources, has spawned numerous unnecessary intractable enemies, has not enhanced the security of the American people and has been a futile exercise. There will never again be a 1974 type oil embargo. Even our bitterest enemies such as Venezuela beat a path to our doors to sell their oil for the hard currency they desperately need. Iran, like most of the predominantly Muslim countries will eventually collapse and transform. Islamic culture is simply not compatible with the values ,institutions and practices of the modern world that the vast majority of rational people covet. It is the reason most of the Mideast is chaotically violent or inherently unstable. It is also why people are voting with their feet and seeking solace in the lands formerly known as Christendom. Try to comprehend the real situation and be a bit more judicious before you advocate the US being involved in yet more foreign entanglements and quagmires. Reflect carefully on what has happened over the last ten years.