I would think that if they're there, everybody would be a whole lot less concerned about Iran stupidly tryin ta close the place down for a change. But that's why I pinged you, cause I just knew you'd know!!! (grin)
Iran's economy is totally dependent on oil exports. If they had to depend on rug exports alone, the economy would crash.
The US carriers are there only to threaten Iran and a war would halt oil exports. The oil markets think we're bluffing for the time being, I think.