Up until now, I believed the nuclear threat to the U.S. from Iran was limited to the ability of terrorists to penetrate the borders or port security to deliver a device to a major city. ...While that threat should continue to be a grave concern for every American, these tests by Iran demonstrate just how devious the fanatical mullahs in Tehran are. We are facing a clever and unscrupulous adversary in Iran that could bring America to its knees.