Iranian Earthquake?

As the rumors of war build, it seems that there were two earthquakes in Iran earlier this week. They were small, as far as earthquakes go, but now an Iranian scientist is saying that the quakes were actually successful underground nuclear explosions.

Read the article here; http://www.israelnationalnews.com/News/News.aspx/128151

If this turns out to be true, Israel will have a very difficult choice. One, they can learn to live with Iranian nukes and just cross their fingers and pray that Iran won't ship a nuke down to Lebanon and give it to Hezbollah. Or two, they can launch a full scale attack on Iran and hope they blow their nuclear program back to kingdom come. If they choose this path, they will need to be ready for a responsive attack from Iran, Hezbollah in Lebanon, Syria and probably a large uprising from Hamas in Gaza and the West Bank. Also, Russia might get into the action very quickly as they have signed agreements of cooperation with Iran, Syria and other enemies of Israel.

If this all goes down....what do you think the U.S. would do? Sit by and watch Israel fight for it's life all by itself? Or would we enter into the fray?