But none of these things—least of all the notion that Barack Obama, for whom initiating new wars in the Middle East is not a foreign-policy goal, will soon order the American military into action against Iran—seems, at this moment, terribly likely. What is more likely, then, is that one day next spring, the Israeli national-security adviser, Uzi Arad, and the Israeli defense minister, Ehud Barak, will simultaneously telephone their counterparts at the White House and the Pentagon, to inform them that their prime minister, Benjamin Netanyahu, has just ordered roughly one hundred F-15Es, F-16Is, F-16Cs, and other aircraft of the Israeli air force to fly east toward Iran—possibly by crossing Saudi Arabia, possibly by threading the border between Syria and Turkey, and possibly by traveling directly through Iraq’s airspace, though it is crowded with American aircraft. (It’s so crowded, in fact, that the United States Central Command, whose area of responsibility is the greater Middle East, has already asked the Pentagon what to do should Israeli aircraft invade its airspace. According to multiple sources, the answer came back: do not shoot them down.)

In these conversations, which will be fraught, the Israelis will tell their American counterparts that they are taking this drastic step because a nuclear Iran poses the gravest threat since Hitler to the physical survival of the Jewish people. The Israelis will also state that they believe they have a reasonable chance of delaying the Iranian nuclear program for at least three to five years. They will tell their American colleagues that Israel was left with no choice. They will not be asking for permission, because it will be too late to ask for permission.

When the Israelis begin to bomb the uranium-enrichment facility at Natanz, the formerly secret enrichment site at Qom, the nuclear-research center at Esfahan, and possibly even the Bushehr reactor, along with the other main sites of the Iranian nuclear program, a short while after they depart en masse from their bases across Israel—regardless of whether they succeed in destroying Iran’s centrifuges and warhead and missile plants, or whether they fail miserably to even make a dent in Iran’s nuclear program—they stand a good chance of changing the Middle East forever; of sparking lethal reprisals, and even a full-blown regional war that could lead to the deaths of thousands of Israelis and Iranians, and possibly Arabs and Americans as well; of creating a crisis for Barack Obama that will dwarf Afghanistan in significance and complexity; of rupturing relations between Jerusalem and Washington, which is Israel’s only meaningful ally; of inadvertently solidifying the somewhat tenuous rule of the mullahs in Tehran; of causing the price of oil to spike to cataclysmic highs, launching the world economy into a period of turbulence not experienced since the autumn of 2008, or possibly since the oil shock of 1973; of placing communities across the Jewish diaspora in mortal danger, by making them targets of Iranian-sponsored terror attacks, as they have been in the past, in a limited though already lethal way; and of accelerating Israel’s conversion from a once-admired refuge for a persecuted people into a leper among nations.

If a strike does succeed in crippling the Iranian nuclear program, however, Israel, in addition to possibly generating some combination of the various catastrophes outlined above, will have removed from its list of existential worries the immediate specter of nuclear-weaponized, theologically driven, eliminationist anti-Semitism; it may derive for itself the secret thanks (though the public condemnation) of the Middle East’s moderate Arab regimes, all of which fear an Iranian bomb with an intensity that in some instances matches Israel’s; and it will have succeeded in countering, in militant fashion, the spread of nuclear weapons in the Middle East, which is, not irrelevantly, a prime goal of the enthusiastic counter-proliferator who currently occupies the White House.

I am not engaging in a thought exercise, or a one-man war game, when I discuss the plausibility and potential consequences of an Israeli strike on Iran. Israel has twice before successfully attacked and destroyed an enemy’s nuclear program. In 1981, Israeli warplanes bombed the Iraqi reactor at Osirak, halting—forever, as it turned out—Saddam Hussein’s nuclear ambitions; and in 2007, Israeli planes destroyed a North Korean–built reactor in Syria. An attack on Iran, then, would be unprecedented only in scope and complexity.

I have been exploring the possibility that such a strike will eventually occur for more than seven years, since my first visit to Tehran, where I attempted to understand both the Iranian desire for nuclear weapons and the regime’s theologically motivated desire to see the Jewish state purged from the Middle East, and especially since March of 2009, when I had an extended discussion about the Iranian nuclear program with Benjamin Netanyahu, hours before he was sworn in as Israel’s prime minister. In the months since then, I have interviewed roughly 40 current and past Israeli decision makers about a military strike, as well as many American and Arab officials. In most of these interviews, I have asked a simple question: what is the percentage chance that Israel will attack the Iranian nuclear program in the near future? Not everyone would answer this question, but a consensus emerged that there is a better than 50 percent chance that Israel will launch a strike by next July. (Of course, it is in the Israeli interest to let it be known that the country is considering military action, if for no other reason than to concentrate the attention of the Obama administration. But I tested the consensus by speaking to multiple sources both in and out of government, and of different political parties. Citing the extraordinary sensitivity of the subject, most spoke only reluctantly, and on condition of anonymity. They were not part of some public-relations campaign.) The reasoning offered by Israeli decision makers was uncomplicated: Iran is, at most, one to three years away from having a breakout nuclear capability (often understood to be the capacity to assemble more than one missile-ready nuclear device within about three months of deciding to do so). The Iranian regime, by its own statements and actions, has made itself Israel’s most zealous foe; and the most crucial component of Israeli national-security doctrine, a tenet that dates back to the 1960s, when Israel developed its own nuclear capability as a response to the Jewish experience during the Holocaust, is that no regional adversary should be allowed to achieve nuclear parity with the reborn and still-besieged Jewish state.

In our conversation before his swearing-in, Netanyahu would not frame the issue in terms of nuclear parity—the Israeli policy of amimut, or opacity, prohibits acknowledging the existence of the country’s nuclear arsenal, which consists of more than 100 weapons, mainly two-stage thermonuclear devices, capable of being delivered by missile, fighter-bomber, or submarine (two of which are said by intelligence sources to be currently positioned in the Persian Gulf). Instead, he framed the Iranian program as a threat not only to Israel but to all of Western civilization.

“You don’t want a messianic apocalyptic cult controlling atomic bombs,” he said. “When the wide-eyed believer gets hold of the reins of power and the weapons of mass death, then the world should start worrying, and that’s what is happening in Iran.” Israel, Netanyahu told me, is worried about an entire complex of problems, not only that Iran, or one of its proxies, would destroy Tel Aviv; like most Israeli leaders, he believes that if Iran gains possession of a nuclear weapon, it will use its new leverage to buttress its terrorist proxies in their attempts to make life difficult and dangerous; and he fears that Israel’s status as a haven for Jews would be forever undermined, and with it, the entire raison d’être of the 100-year-old Zionist experiment.

In our conversation, Netanyahu refused to discuss his timetable for action, or even whether he was considering military preemption of the Iranian nuclear program. But others familiar with his thinking helped me understand his worldview. Netanyahu’s belief is that Iran is not Israel’s problem alone; it is the world’s problem, and the world, led by the United States, is duty-bound to grapple with it. But Netanyahu does not place great faith in sanctions—not the relatively weak sanctions against Iran recently passed by the United Nations Security Council, nor the more rigorous ones being put in place by the U.S. and its European allies. Those close to him say that Netanyahu understands, however, that President Obama, with whom he has had a difficult and intermittently frigid—though lately thawing—relationship, believes that stringent sanctions, combined with various enticements to engage with the West, might still provide Iran with what one American administration official described to me as “a dignified off-ramp for Tehran to take.”

But, based on my conversations with Israeli decision-makers, this period of forbearance, in which Netanyahu waits to see if the West’s nonmilitary methods can stop Iran, will come to an end this December. Robert Gates, the American defense secretary, said in June at a meeting of NATO defense ministers that most intelligence estimates predict that Iran is one to three years away from building a nuclear weapon. “In Israel, we heard this as nine months from June—in other words, March of 2011,” one Israeli policy maker told me. “If we assume that nothing changes in these estimates, this means that we will have to begin thinking about our next step beginning at the turn of the year.”

The Netanyahu government is already intensifying its analytic efforts not just on Iran, but on a subject many Israelis have difficulty understanding: President Obama. The Israelis are struggling to answer what is for them the most pressing question: are there any circumstances under which President Obama would deploy force to stop Iran from going nuclear? Everything depends on the answer.

The Israelis argue that Iran demands the urgent attention of the entire international community, and in particular the United States, with its unparalleled ability to project military force. This is the position of many moderate Arab leaders as well. A few weeks ago, in uncommonly direct remarks, the ambassador of the United Arab Emirates to the United States, Yousef al-Otaiba, told me—in a public forum at the Aspen Ideas Festival—that his country would support a military strike on Iran’s nuclear facilities. He also said that if America allowed Iran to cross the nuclear threshold, the small Arab countries of the Gulf would have no choice but to leave the American orbit and ally themselves with Iran, out of self-protection. “There are many countries in the region who, if they lack the assurance the U.S. is willing to confront Iran, they will start running for cover towards Iran,” he said. “Small, rich, vulnerable countries in the region do not want to be the ones who stick their finger in the big bully’s eye, if nobody’s going to come to their support.”

Several Arab leaders have suggested that America’s standing in the Middle East depends on its willingness to confront Iran. They argue self-interestedly that an aerial attack on a handful of Iranian facilities would not be as complicated or as messy as, say, invading Iraq. “This is not a discussion about the invasion of Iran,” one Arab foreign minister told me. “We are hoping for the pinpoint striking of several dangerous facilities. America could do this very easily.”

The Israeli national-security adviser, Uzi Arad, once told me that the prime minister will sometimes, in the course of briefing foreign visitors on the importance of taking action against Iran’s nuclear program, say jokingly: “Let me tell you a secret. The American military is bigger than Israel’s.”

Barack Obama has said any number of times that he would find a nuclear Iran “unacceptable.” His most stalwart comments on the subject have been discounted by some Israeli officials because they were made during his campaign for the presidency, while visiting Sderot, the town in southern Israel that had been the frequent target of rocket attacks by Hamas. “The world must prevent Iran from obtaining a nuclear weapon,” he said. “I will take no options off the table in dealing with this potential Iranian threat. And understand part of my reasoning here. A nuclear Iran would be a game-changing situation, not just in the Middle East, but around the world. Whatever remains of our nuclear nonproliferation framework, I think, would begin to disintegrate. You would have countries in the Middle East who would see the potential need to also obtain nuclear weapons.”

But the Israelis are doubtful that a man who positioned himself as the antithesis of George W. Bush, author of invasions of both Afghanistan and Iraq, would launch a preemptive attack on a Muslim nation.

“We all watched his speech in Cairo,” a senior Israeli official told me, referring to the June 2009 speech in which Obama attempted to reset relations with Muslims by stressing American cooperativeness and respect for Islam. “We don’t believe that he is the sort of person who would launch a daring strike on Iran. We are afraid he would see a policy of containing a nuclear Iran rather than attacking it.”

This official noted that even Bush balked at attacking Iran’s nuclear facilities, and discouraged the Israelis from carrying out the attack on their own. (Bush would sometimes mock those aides and commentators who advocated an attack on Iran, even referring to the conservative columnists Charles Krauthammer and William Kristol as “the bomber boys,” according to two people I spoke with who overheard this.)

“Bush was two years ago, but the Iranian program was the same and the intent was the same,” the Israeli official told me. “So I don’t personally expect Obama to be more Bush than Bush.”

If the Israelis reach the firm conclusion that Obama will not, under any circumstances, launch a strike on Iran, then the countdown will begin for a unilateral Israeli attack. “If the choice is between allowing Iran to go nuclear, or trying for ourselves what Obama won’t try, then we probably have to try,” the official told me.

Which brings us to a second question, one having to do with the nature of the man considering military action: would Netanyahu, a prime minister with an acute understanding of the essential role America plays in securing the existence of Israel (Netanyahu is a graduate of both Cheltenham High School, outside Philadelphia, and MIT, and is the most Americanized prime minister in Israel’s history, more so even than the Milwaukee-raised Golda Meir), actually take a chance on permanently alienating American affection in order to make a high-risk attempt at stopping Iran? If Iran retaliates against American troops in Iraq or Afghanistan, the consequences for Israel’s relationship with America’s military leadership could be catastrophic. (Of course, Netanyahu would be risking more than his relationship with the United States: a strike on Iran, Israeli intelligence officials believe, could provoke all-out retaliation by Iran’s Lebanese subsidiary, Hezbollah, which now possesses, by most intelligence estimates, as many as 45,000 rockets—at least three times as many as it had in the summer of 2006, during the last round of fighting between the group and Israel.)

“The only reason Bibi [Netanyahu] would place Israel’s relationship with America in total jeopardy is if he thinks that Iran represents a threat like the Shoah,” an Israeli official who spends considerable time with the prime minister told me. “In World War II, the Jews had no power to stop Hitler from annihilating us. Six million were slaughtered. Today, 6 million Jews live in Israel, and someone is threatening them with annihilation. But now we have the power to stop them. Bibi knows that this is the choice.”

Numerous Israeli commentators and analysts have pointed out to me that Netanyahu is not unique in his understanding of this challenge; several of the prime ministers who preceded him cast Iran’s threat in similarly existential terms. Still, Netanyahu is different. “He has a deep sense of his role in Jewish history,” Michael Oren, Israel’s ambassador to the United States, told me.

To understand why Netanyahu possesses this deep sense—and why his understanding of Jewish history might lead him to attack Iran, even over Obama’s objections—it is necessary to understand Ben-Zion Netanyahu, his 100-year-old father.

Read the rest of the article.