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Israel strikes Iran. What happens next?

Summary

Brookings scholars examine the implications of Israel's surprise attack on Iran for the region and beyond.

Full Text

On June 12, Israel carried out a series of airstrikes in Iran targeting the country’s nuclear sites.

The surprise attack was followed by several days of Israel and Iran trading deadly strikes.

Below, Brookings scholars examine the implications of the attack for the region and beyond.

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Asli Aydintasbas

Israel’s strike and America’s choice

For anyone seeking evidence that the world is going through a historic inflection point, the summer of 2025 will have plenty to offer.

Israel’s strikes to decapitate Iran’s military leadership and degrade its nuclear program—launched only days before the sixth round of negotiations between Washington and Tehran—have been an extraordinary initial success.

Through coordinated operations, the Israeli military neutralized Iran’s air defense, established air superiority, eliminated top Iranian generals and nuclear scientists, and struck hundreds of targets, including Iran’s key enrichment facilities at Natanz and Fordow.

Not surprisingly, the Trump administration’s tone has quickly changed from Secretary of State Marco Rubio’s initial remarks about Israel acting unilaterally  (“We are not involved in strikes against Iran” ) to President Donald Trump bragging about having  prior knowledge  of the operation and  U.S. weapons used.

But the real question is whether Trump will go beyond rhetoric and formally join Israel’s war on Iran.

While Operation Rising Lion has burnished Israel’s credentials as the regional hegemon, it has not achieved the destruction of Iran’s nuclear program.

Reports suggest much of the enrichment activity in Fordow  remains intact —and Tehran will  likely accelerate its program  once hostilities cease.

To achieve the goal of substantially downgrading Iran’s nuclear capacity, Israel needs advanced U.S. weapons and possibly air support in destroying layers of the underground installations at Fordow.

Therein lies the legacy-defining challenge for Trump, the man who ran on ending wars but has made little progress toward peace in Ukraine, Gaza, or elsewhere.

Will the United States revert to its traditional role as the region’s hegemon and sheriff, and allow itself to get sucked into another Middle East war?

Or will Trump listen to the restrainers in his “America First” coalition and maintain some distance from this fight?

Trump is undoubtedly torn between his restrainer instincts, warning him that direct U.S. engagement in a war with Iran could have devastating consequences for the United States and its allies, and Israel’s push to finish the job.

His choice is anyone’s guess but will determine how the next chapter in world history is written.

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Robert Einhorn

Military means alone won’t eliminate Iran’s nuclear program

In the initial phases of their campaign, the Israelis have done significant damage to Iran’s nuclear program.

But eliminating that program would require much more in subsequent phases, including severely damaging or destroying the deeply buried Fordow enrichment facility.

Unless the Israelis can devise novel ways of incapacitating that facility or persuade President Donald Trump to destroy it using a massive U.S. earth-penetrating bomb unavailable to them, Fordow will be a major deficiency in Israel’s war aims.

Even if Fordow and other critical facilities could be destroyed, most experts believe Iran could reconstitute its nuclear program in a year or two and would likely do so at secret locations, having evicted inspectors from the International Atomic Energy Agency—requiring repeated attacks for the indefinite future.

Israeli National Security Advisor Tzachi Hanegbi said on Friday that military strikes alone won’t be able to totally destroy Iran’s nuclear program and that Israel’s goal is to pressure Iran into agreeing to completely dismantle its program.

Trump has also expressed the hope that the military campaign will force Iran to come to the negotiating table and accept zero enrichment.

But hopes for Iran abandoning its nuclear program underestimate its resilience and attachment to its enrichment program and ignore that Israel’s attack will strengthen, not weaken, its desire for nuclear weapons.

Israelis probably understand this—which is why they regard regime change as the most promising means of ending the Iranian nuclear threat and why it is a thinly-veiled goal of their campaign.

But regime change is difficult to engineer.

And there’s no guarantee that a successor regime, perhaps led by the Islamic Revolutionary Guard Corps, will be less interested in nuclear weapons than the current one.

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Vanda Felbab-Brown

Israel has mastered clandestine operations

Whether or not Israel’s attack on Iran accomplishes Tel Aviv’s strategic objectives, the initial strikes show once again Israel’s mastery of clandestine operations.

Like its stunning decapitation of Hezbollah’s leaders by exploding walkie-talkies in September 2024, Israel was once again able to identify and track the location of key Iranian military leaders, including the head of the Islamic Revolutionary Guard Corps, Hossein Salami, who was killed, and this time, also smuggle drones deep into Iran for a range of attacks.

The latter likely required an extended presence of Israel’s operatives in Iran, a feat all the greater since one would have expected Iran to significantly improve its counterintelligence after the Hezbollah decapitation and after the political chief of Hamas, Ismail Haniyeh, was killed by Israel in July 2024—in Tehran, no less.

The persisting weakness of Iran’s counterintelligence will hamper its ability to rebuild its proxy militias, such as Hezbollah in Lebanon and the Houthis in Yemen, whom Israel is now also hitting.

In addition to Iran’s depleted resources and its focus on internal rebuilding, the glamour of Iran’s support for militia forces across the Middle East is badly damaged.

This provides opportunities to politically, economically, and institutionally attempt to weaken Iran-supported militias in Iraq.

Iran may well resort to more assassination attempts of its own—such as against Israeli targets, perhaps outside of Israel.

It has attempted to assassinate Iranian political dissidents, such as in New York and Europe, as well as former U.S. government officials.

While these attacks have caused grave damage to their victims even when they fail, since the targets have their lives dramatically disrupted for a long time, and sap targeted countries’ counterintelligence and law enforcement resources, the Iranian clandestine operations have been often unsuccessful.

Iran has frequently relied on rather incompetent criminals (sometimes not even criminal groups) and failed to detect sting operations by law enforcement.

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Sharan Grewal

Netanyahu is becoming a liability for Trump

President Donald Trump had campaigned on a promise to end all wars, particularly the wars in Ukraine and Gaza.

Yet today, each continues to escalate.

Israel’s attack on Iran undermines Trump’s claim to be a peacemaker and his assertion that wars would never have started under his leadership.

Although Secretary of State Marco Rubio had attempted to paint the strikes as a unilateral Israeli decision, the choice to move U.S.

Embassy staff and military families out of harm’s way was in effect a green light.

Trump’s claim that “ we knew everything,” and that the attack occurred because his 60-day ultimatum to Iran expired, likewise suggests a level of coordination.

Israel, for its part, claimed the United States provided intelligence, defense against Iranian retaliation, and bunker-buster bombs earlier this year.

This level of involvement in Israel’s war with Iran puts Trump in a difficult position.

He had wanted a deal to solidify his image as a peacemaker and perhaps win himself a  Nobel Peace Prize  one day.

Instead, negotiations with Iran have been suspended.

While Iran may eventually rejoin, it will do so with even less trust in the United States and Israel than before, making a deal even more difficult to reach.

Finally, Israel’s attack has amplified divisions among Republicans, with Iran hawks like Lindsey Graham urging the United States to “ fly with Israel,” and America First folks like Tucker Carlson urging the United States to “ drop Israel.” The longer the conflict continues, the more likely Trump is to lose one side of his base.

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Samantha Gross and Louison Sall

Flipping the script on global oil markets

The global oil market has experienced whiplash-inducing events over the last two weeks.

On May 31, the members of OPEC+ (a coalition of OPEC members and other large oil producers that formed in 2016 ) announced the latest in a series of production quota increases.

Oil prices looked to be headed downward, and markets were well supplied.

Alot can change overnight.

Israel’s military strikes initially focused on Iran’s nuclear program, but on June 14, they included an oil refinery and production and processing facilities for South Pars, the world’s largest natural gas field.

The global benchmark Brent Crude oil price jumped 7% on June 13, the day after the attacks began, and a further 0.5% on the morning of June 16.

Concern falls into two categories.

First, Iran is today the world’s ninth-largest oil producer, despite international sanctions.

Spare oil production capacity in OPEC+ is roughly equal to Iran’s production, so a large disruption in Iranian production would leave supply very precarious.

The greater concern is that Iran controls the Strait of Hormuz, a global chokepoint through which about 20% of global oil shipments pass.

Closure of the strait or significantly disrupted oil shipments could bring about a global energy crisis and pull the other Gulf oil producers, who would see their shipments and revenues disrupted, into the conflict.

Houthi actions in the Red Sea demonstrated that a few strikes on strategic targets can have outsized effects on globa

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Document ID: israel-strikes-iran-what-happens-next