Better the US does not take the bait. Let Iran mouth off, it's cheaper. The US can quietly through the Swiss let them know that yes Iran can close the Strait but the US can open it-within a week the entire Iranian economy comes to a complete halt. They have limited refining capacity and there are no pipelines from Iran to Russia, China or India. Saudi Arabia can pipe out considerable product and there are other sources for crude besides shipping from the gulf. The US needn't fire a shot-but just wait until they do. Iran's navy evaporates, it's nuke facilities will be under attack and Iran can do little about it. The mullah's not being able to hit the US will be turning on its own restive, disillusioned population. Ah Springtime.
CNN Turk: Turkish planes hit PKK targets in southeastern Turkey, northern Iraq (Reuters)
from the article: Iran official: U.S. cannot stop us from cutting off world oil supply