Iran poses a threat to the United States and its allies due to its sponsorship of terror, probable pursuit of weapons of mass destruction, and support for the insurgency in Iraq. The profile of the Iranian threat has increased over the last year due to the election of President Mahmoud Ahmadinejad, who has made public threats against the United States and Israel, the continuation of Iranian nuclear weapons research, and the recent attacks by Hezbollah, an Iranian terrorist proxy, against Israel.
Sums it up nicely (if I can use that word). We cannot live with this regime having nukes. We can barely live with the mullahs when they don't have nukes, for God's sake.
Saddle up. The war ain't over yet.