Historically, states pursued nuclear weapons under the protective assumption that deterrence begins once a program reaches maturity; that is, when nuclear devices are assembled, tested, or deployed. To some extent all nine nuclear weapon states achieved that level of deterrent threshold during their proliferation stages. Iran had not achieved such maturity. Furthermore, when looking at the region historically the Israeli attack on Iraq’s Osirak reactor in 1981 and the 2007 strike on Syria’s Al-Kibar site both hinted at a willingness on the Israelis’ part to act preemptively to stop regional proliferators.

But the scale and coordination of this most recent strike go further. It sends a global message that enrichment facilities themselves, when capable of being targeted and penetrated by American GBU-57 bombs, inherently means that once you are closing in on enrichment, your facilities are fair game. This will be the truest when referring to adversaries of the US and its alliance network. It remains to be seen what would take place if an ally of the US were to proliferate nuclear weapons in this modern era without its consent.

This shift has profound implications for the future of proliferation. Any adversarial state aspiring to build nuclear weapons will now face a new strategic prerequisite: it must first develop the defensive capability to withstand a preemptive strike before it can even hope to proliferate successfully. That means constructing extensive, deeply buried underground facilities, tunnel networks, and hardened bunkers. They must be capable of surviving the US military’s most sophisticated bunker-busting munitions. It also means investing in robust air defenses, redundancy, deception, and a level of operational secrecy that rivals the most advanced intelligence agencies in the world.

Not every state can afford this. Proliferation is already an expensive and politically risky endeavor. The need to develop advanced passive defenses only compounds those challenges. Most would-be proliferators simply will not have the financial or technical wherewithal to defend their nuclear infrastructure at such a level, especially in the early, vulnerable stages of enrichment.

Iran, of course, will likely try again. The Islamic Republic has proven resilient, adaptive, and committed to achieving strategic parity with its adversaries. Unless it develops an indigenous system of defenses that can shield its critical infrastructure from aerial bombardment, future attempts will likely meet the same fate as the current one. Even if Iran builds bunkers and tunnel systems deep enough to shield its centrifuges, it will still face challenges of concealment, resource constraints, and foreign intelligence penetration.

The broader lesson here is stark; the window of opportunity for slow, open, or vulnerable proliferation may be closing. In the post Iran–strike era, nuclear aspirants will have to prepare for war before they prepare for the bomb. The cost of entry into the nuclear club has just gone up, not only in material terms but in strategic risk. Any state hoping to proliferate must now assume it will be struck before it succeeds.

This may serve to slow the pace of proliferation, but it could also make it more dangerous. Proliferators who internalize the lessons of the Iran strike may respond with greater urgency, opacity, and desperation. They may forgo the traditional step-by-step approach in favor of crash programs hidden deep underground or even move toward asymmetric hedging strategies that involve acquiring key technologies without crossing visible red lines. In such an environment, the risk of miscalculation on all sides grows.

The strike on Iran may therefore reduce the number of proliferators in the long run. But for those that do try, the game has certainly changed. As Stephen Cimbala recently argued, the precedent set by the Midnight Hammer strike on Iran should not be viewed in isolation. It marks a return to kinetic counter-proliferation under conditions of rising global instability, where deterrence is increasingly challenged by uncertainty and misperception.

In parallel, Peter Huessy emphasizes that restoring deterrence requires more than just missile defense or military strikes; it demands clarity of will and credible commitment to prevent nuclear breakout by adversaries.

Together, their analyses suggest that the US-Israel strike was not just about denying Iran the bomb, but it was also about reestablishing the normative firebreak against nuclear proliferation. The broader message is unambiguous: in an era where deterrence is fraying, those who wish to proliferate must now calculate not only how to build a bomb, but also how to survive the storm that will precede it.

If Iran is the test case, the future of proliferation will be shaped as much by preemption as by prevention, and only those with the means to withstand a midnight hammer will have any chance at joining the nuclear club. From now on, the path to the bomb runs through the rubble of facilities like Natanz and Fordow, and only the most prepared will make it out the other side.

Aaron Holland is a PhD Student at the University of Nebraska-Lincoln and an analyst at the National Institute for Deterrence Studies. All views expressed are the author’s own.

How US and Israeli Attacks on Iran Will Reshape the Future of Nuclear Proliferation was originally published on Global Security Review.

Little doubt exists that Iran was in violation of the Nuclear Non-Proliferation Treaty prior to American airstrikes. Although Iran is a signatory to the treaty, the International Atomic Energy Agency (IAEA) has long complained of Iranian efforts to hinder IAEA inspections. Iran started its nuclear energy program in the 1950s when President Dwight Eisenhower and the Shah had a good relationship and the Atoms for Peace program was a noble effort.

The relationship between Iran and the United States collapsed with the fall of the Pahlavi dynasty in 1979. When the Iranian government was overthrown by Ayatollah Ruhollah Khomeini, the US took on the moniker of “the Great Satan” and the Islamic Republic never stopped condemning the United States, all while spending the past four decades supporting terror groups that attack American targets. During the Iran-Iraq War (1980–1988), the Islamic Republic began looking into the development of nuclear weapons but did not take major strides in that effort until after the American response to the September 11, 2001, attacks on the United States.

Given the long animosity between the United States and Iran, neither Israel nor the United States would have opposed regime change had the “Twelve Day War” led to such a result. A new, pro-American, regime would certainly desire a nuclear weapon less than the current regime. Ayatollah Ali Khamenei, the current ruler, was not toppled and is now cracking down on Iranian society as dissidents are rounded up and often executed.

Although China and Russia did not intervene on Iran’s behalf during the war, within 24 hours of the American attack messages of support for the regime were issued by authoritarians, like Russian president, Vladimir Putin. Set aside former Russian president and prime minister Dmitry Medvedev’s claim that “some countries” might give Iran nuclear weapons because of the American strike. Such a remark was unserious. But Russia very well may help Iran reconstitute its nuclear program.

What does matter is that the post-war behavior of Ayatollah Khamenei shows a pattern of continued aggression in the face of defeat, which is supported by Russia for its own interests. It is unlikely Russia or China will play a constructive role in helping the United States find a lasting resolution to the Iran problem.

Israel’s recent air campaign and covert operations in Iran should shock the Iranian regime into reconsidering its fundamental approach, but Iran’s raison d’etre (reason for being) is to both fight the Americans and the Jews. It offers little else. Thus, making peace with the Gret Satan and “the Jews” challenges five decades of anti-American and anti-Jewish propaganda. For the Ayatollah and his regime, such a change in direction is destabilizing at best.

The Israeli assassination of key Iranian Revolutionary Guard Corps generals and Iran’s leading nuclear scientists was both a practical solution to a difficult problem and a warning to Israel’s enemies. Whether or not these assassinations have a long-term effect is uncertain.

There is certainly a pipeline of scientists training in China and Russia that will step in where their predecessors left off. Given their own interest in creating a distraction for the United States, China and Russia will likely continue to support Iran’s aspirations. So, too, will North Korea. This may allow Iran to learn from its recent experience and rebuild more effectively.

There is also the battle damage assessment, which, absent on-the-ground intelligence, can only make informed assessments about the destruction of facilities like Fordow. Undoubtedly, the American mission was impressive and executed flawlessly, but Iran always knew its facilities were an enticing target for American stealth bombers. Hopefully, American intelligence estimates are correct and the GBU-57s destroyed their intended targets, setting back the Iranian nuclear program for years. Better yet, enriched uranium is buried under hundreds of feet of debris.

However, should American and Israeli efforts fail, and Iran somehow reconstitutes its nuclear program and is able to field a working nuclear weapon, both Israel and the United States still have the ability to deter Iran from using such a weapon. Iranians are an ancient people who can trace their civilization back 3,000 years. When Darius the Great established the world’s greatest empire (522–486 BC), he set Iran on the path to becoming one of the planet’s great civilizations. Ayatollah Khamenei, for all his bluster, is not willing to see that history destroyed along with the Iranian people.

Unquestionably, the situation is complex and will continue to evolve. Let us hope that President Trump, Prime Minister Benjamin Netanyahu, and the president of Iran, Masoud Pezeshkian, can reach an agreement that ensures the security of all three countries. But if Iran refuses to negotiate in good faith, let us hope Israeli intelligence remains effective and Iranian air defenses are still unable to see American stealth bombers.

Sam Stanton is a Professor of International Relations at Grove City College and a Senior Fellow at the National Institute for Deterrence Studies.

Results in Iran was originally published on Global Security Review.

An American submarine also fired thirty Tomahawk Land Attack Missiles (TLAM) against surface infrastructure targets at Isfahan. As Chairman of the Joint Chiefs of Staff General Dan Caine described it, the entire operation was a complex timed maneuver requiring exact synchronization across multiple platforms in a narrow piece of airspace.

American deception tactics contributed to surprise as neither Iraqi fighters nor their surface-to-air missile defenses attempted to interdict the American bombers and their supporting fighter aircraft, all of which returned safely.

According to General Caine, Operation Midnight Hammer involved more than 125 aircraft, including the seven B2 stealth bombers, numerous fourth- and fifth-generation fighters, and dozens of refueling tankers. Some 75 precision-guided munitions were used in Midnight Hammer, including fourteen GBU-57 MOPs, which were used for the first time in combat.

The operational excellence of Midnight Hammer doubtless constituted a setback to Iran’s nuclear enrichment programs, although exactly how much of a setback remains to be determined.  Battle damage assessment is dependent on overhead photography unless and until further information is obtained from intelligence sources near or at the affected sites.

There also remained unsettled issues relative to American and allied strategy going forward. The Trump administration’s declaratory policy wants to draw a line between going to war with Iran, on one hand, and neutralizing its nuclear capabilities and potential, on the other.  This is a fine line to draw and Iran response, and follow-on condemnations, suggest they see the American position as a distinction without a difference.

Ater the strikes, President Trump indicated that Iran should come to the diplomatic table and negotiate the status of its nuclear future. Iran rejected further negotiations. This left the American and Israeli defense communities to await whatever diplomatic or military response the Iranians offered, including possible military attacks against American forces deployed in the Middle East.

Based on experience, Iran would likely respond with continuing missile strikes against Israel and asymmetrical warfare against the United States. With regard to the latter, Iran’s options included: (1) disrupting the flow of maritime traffic in the Strait of Hormuz; (2) committing cyberattacks against American military or societal targets; (3) committing missile or insurgent attacks against American military personnel in Iraq or elsewhere in the region; (4) supporting protest demonstrations or terrorism in the American homeland, perhaps making use of prepositioned cells made up of illegal aliens; and/or (5) encouraging Iranian proxies in Gaza, Lebanon, and Yemen to further harass American, Israeli, and allied interests.

Thus far, Iran limited its response to employing a small number of missiles against Al Udeid Air Base in Qatar, even giving the Americans advance warning of the strike. For the Trump administration, this is the best possible outcome. Already, imagery intelligence suggests Iran is digging out its capabilities at Fordow and Esfahan. What the future may hold is uncertain. Whether Iran is simply buying time and learning lessons for future success or whether the regime truly desires peace is up in the air.

Future options for Iran have their positives and negatives. Disruptions in the Strait of Hormuz would harm Iran’s own economy, which needs the infusion of cash from oil sales to China.

Cyberattacks are a low-risk, low-cost option that may appeal to Iran in the near term, but they present a more serious potential threat to civilian targets compared to more heavily defended military ones. They will also draw severe reprisals from very competent American and Israeli cyber forces.

Additional attacks against American military personnel and facilities in Iraq are an option, as are missile or unconventional warfare against other regional states hosting American military bases. However, this path was not successful the first time.

Support for antiwar demonstrations or outright terrorism in the American homeland, including “lone wolf” terrorists recruited online, are still a possibility. New stories of Iranian illegal aliens arrested by Immigration and Customs Enforcement are almost a daily occurrence.

As for Iranian proxies, Hamas and Hezbollah are on the ropes, momentarily, due to prior engagements with Israel, but the Houthis declared their intention to plus-up their disruptions of commerce in the Red Sea in the wake of Midnight Hammer. Whether this is possible is yet to be seen.

With respect to Iran’s future nuclear options and American responses, they may proceed in one of three ways: (1) a continuing “whack-a-mole” competition in which Iran continues surreptitious enrichment and the US and Israel continue to monitor its progress and, if necessary, repeat Midnight Hammer, or worse; (2) Iran undergoes a change of regime due to domestic opposition, leaving uncertain for a time exactly who is in charge and who controls the supplies of enriched uranium and nuclear infrastructure, never mind the armed forces and security police; or (3) Iran agrees to negotiate with the US and representatives of the international community another deal to limit its stockpiles of fissile material and its levels of enrichment.

These are possible options, but by no means the only options. Iran may pursue an unexpected path in an effort to outthink the United States and Israel. Whatever the future holds, President Trump and Israeli Prime Minister Benjamin Netanyahu must keep a close eye on a regime that is built on destroying both countries. Hope is critical to human perseverance, but it is not a strategy.

Dr. Stephen Cimbala is Distinguished Professor of Political Science at Penn State university, Brandywine. He is currently a senior fellow with the National Institute for Deterrence Studies. Views expressed in this article are the author’s own.

Midnight Hammer and After was originally published on Global Security Review.

Engineering & Intelligence Combined
What began in 2009 with the Defense Threat Reduction Agency’s monitoring of Iran’s Fordow site evolved into a cutting-edge capability. The 30,000‑lb GBU‑57 Massive Ordnance Penetrator (MOP) was precisely engineered—tested hundreds of times and customized in fuse timing and impact parameters—to penetrate deeply buried facilities

Strategic Collaboration & Planning
This achievement isn’t just about hardware. It reflects 15 years of close collaboration between military planners, intelligence analysts, and industry leaders—including Boeing, Northrop Grumman, and the Air Force’s Quick Reaction Capability program

Execution with Precision
On June 22, B‑2 stealth bombers launched Operation “Midnight Hammer,” striking Iran’s Fordow, Natanz, and Isfahan sites with surgical accuracy. The MOP penetrated as planned—leaving minimal surface signatures while delivering deep destruction

What This Means for National Security
This operation showcases how sustained investment in R&D, intelligence integration, and interagency coordination can yield mission-defining capabilities. It exemplifies the strategic patience and partnership necessary for complex, high-stakes operations.

Key Takeaways for Defense & Tech Leaders:

1. Vision Meets Execution – Long-term defense projects require a clear vision, persistent funding, and cross-disciplinary alignment.
2. Testing & Validation – MOP’s success was no accident—it was the result of rigorous modeling, simulation, and live testing.
3. Partnership Power – Defense agencies, military services, and industry must collaborate seamlessly over years to deploy such capabilities.
4. Strategic Deterrence – Precision technologies like the MOP expand strategic options, offering alternatives to broader or more escalatory responses.

As our world grows more complex, this operation demonstrates that when foresight, perseverance, and technological excellence coalesce, they can deliver decisive outcomes.

Let’s discuss: How can lessons from this mission inform future innovation in defense tech and strategic deterrence?

15 Years in the Making: U.S. Precision Strike on Iran’s Fortified Nuclear Site  was originally published on Global Security Review.