Krauthammer vs Krauthammer

Today:

How to create deterrence? The way John Kennedy did during the Cuban missile crisis. President Bush's greatest contribution to nuclear peace would be to issue the following declaration, adopting Kennedy's language while changing the names of the miscreants:

"It shall be the policy of this nation to regard any nuclear attack upon Israel by Iran, or originating in Iran, as an attack by Iran on the United States, requiring a full retaliatory response upon Iran."

Two years ago:

Against millenarian fanaticism glorying in a cult of death, deterrence is a mere wish. Is the West prepared to wager its cities with their millions of inhabitants on that feeble gamble?

Is Iran deterrable or not? And if it is, why is Israel's own nuclear deterrence not enough? Joe Klein weighs in here.