From Seymour Hersh’s sobering New Yorker piece…

There is a growing conviction among members of the United States military, and in the international community, that President Bush’s ultimate goal in the nuclear confrontation with Iran is regime change. Iran’s President, Mahmoud Ahmadinejad, has challenged the reality of the Holocaust and said that Israel must be “wiped off the map.” Bush and others in the White House view him as a potential Adolf Hitler, a former senior intelligence official said. “That’s the name they’re using. They say, ‘Will Iran get a strategic weapon and threaten another world war?’ ”

A government consultant with close ties to the civilian leadership in the Pentagon said that Bush was “absolutely convinced that Iran is going to get the bomb” if it is not stopped. He said that the President believes that he must do “what no Democrat or Republican, if elected in the future, would have the courage to do,” and “that saving Iran is going to be his legacy.”

One former defense official, who still deals with sensitive issues for the Bush Administration, told me that the military planning was premised on a belief that “a sustained bombing campaign in Iran will humiliate the religious leadership and lead the public to rise up and overthrow the government.” He added, “I was shocked when I heard it, and asked myself, ‘What are they smoking?’ ”

Good question.

Later in the piece, Hersh writes:

The Pentagon adviser on the war on terror said that “allowing Iran to have the bomb is not on the table. We cannot have nukes being sent downstream to a terror network. It’s just too dangerous.” He added, “The whole internal debate is on which way to go”—in terms of stopping the Iranian program. It is possible, the adviser said, that Iran will unilaterally renounce its nuclear plans—and forestall the American action. “God may smile on us, but I don’t think so. The bottom line is that Iran cannot become a nuclear-weapons state. The problem is that the Iranians realize that only by becoming a nuclear state can they defend themselves against the U.S. Something bad is going to happen.”

It’s an interesting piece, worth reading in full. And it doesn’t leave one feeling optimistic. Consider, for example, this excerpt:

In Vienna, I was told of an exceedingly testy meeting earlier this year between Mohamed ElBaradei, the I.A.E.A.’s director-general, who won the Nobel Peace Prize last year, and Robert Joseph, the Under-Secretary of State for Arms Control. Joseph’s message was blunt, one diplomat recalled: “We cannot have a single centrifuge spinning in Iran. Iran is a direct threat to the national security of the United States and our allies, and we will not tolerate it”…