Somehow taking them one at a time has kept them off the radar. I too have been complicit in not spreading the word. Iran has 5 American hostages now. Michael Ledeen has the story
Yes, there are American warships in the Gulf, but no one in his right mind expects them to do anything other than show the flag.
But then, nobody even seems to have noticed the existence of a hostage crisis. Why would anyone expect the American government to do anything about it?
Except apparently negotiate for peace in Iraq!! Hopefully there is more to this than what meets the eye.