Those who take Iran's nuke threat lightly are either sleeping or naive. They are also not knowledgeable with the dangers of Islamist-Jihadism and the serious implications of a fanatical Islamist-Jihadist regime having nukes. And they are putting the nation in jeopardy which could lead to repeating the mistake of not being prepared as was in the Yom Kippur War of 1973. With a Mushroom Cloud, there is NO second chance for survival. If fanatical Islamist-Jihadists could kill themselves to cause massive deaths and destructions in America on 9/11, they could also commit the same carnage using nukes when they possess such tools. Hence, never take the threats of fanatical Islamist-Jihadist entities, regimes, and states lightly.
Roadside bomb kills five border officers in western Iraq (AP)
from the article: Livni behind closed doors: Iran nukes pose little threat to Israel