O poder destrutivo do bombardeiro B-2 Spirit, da Força Aérea dos Estados Unidos, marcou um novo capítulo no conflito entre Israel e Irã em junho de 2025, quando os EUA lançaram a bomba Massive The destructive power of the B-2 Spirit bomber, operated by the United States Air Force, marked a new chapter in the Israel-Iran conflict in June 2025, when the US deployed the Massive Ordnance Penetrator (MOP) against Iran’s Fordow nuclear facility. Located 90 meters beneath a mountain near Qom, Fordow is a key target of Iran’s nuclear program, shielded by layers of rock and concrete. The attack, conducted on June 13, utilized the MOP, a 13.6-ton bunker-buster weapon designed to penetrate deep underground before detonating. The US-led operation raises questions about the conflict’s escalation and the role of American weaponry in the region. Why is Fordow so strategic? How has the B-2 Spirit become essential?
The selection of the B-2 Spirit for the mission was no coincidence. This stealth bomber, developed by Northrop Grumman, is the only aircraft capable of carrying the MOP due to its weight and size. The weapon, also known as the GBU-57, is GPS-guided and can penetrate up to 61 meters of earth or 18 meters of reinforced concrete before exploding.
- Unique capability: Only 19 operational B-2s exist, all under US command.
- Lethal precision: The MOP uses smart fuzes that detect voids, maximizing damage to underground targets.
- High cost: Each bomb costs around $3.5 million, with a development program estimated at $400 million.
- Strategic target: Fordow, with its reinforced tunnels, is designed to withstand conventional attacks.
The Fordow strike reflects rising tensions in the Middle East. Israel, which has long pressed the US for access to the MOP, lacks aircraft capable of deploying the bomb, underscoring its reliance on American military support.
What makes the B-2 Spirit unmatched
Designed for long-range missions, the B-2 Spirit is a cornerstone of the US arsenal. Its stealth technology reduces radar visibility, enabling operations in hostile territories like Iran, which possesses Russian and Iranian air defenses. Capable of carrying up to 18 tons of weaponry, the bomber flies at subsonic speeds but compensates with global reach through aerial refueling. In 2017, two B-2s flew for 34 hours straight to strike targets in Libya, showcasing their endurance.
For Fordow, the mission demanded extreme precision. The MOP, dropped from altitudes between 10,000 and 15,000 meters, reaches speeds near Mach 2 during free fall. Its steel and tungsten structure ensures penetration of fortified targets. Experts suggest that completely destroying Fordow may require multiple bombs, dropped in the same spot to deepen the impact.
The June 13 operation was a milestone. It marked the first combat use of the B-2 in years, following a strike against Houthi targets in Yemen in October 2024. The choice of Diego Garcia, a British base in the Indian Ocean, as the launch point facilitated logistics, positioning the bombers 3,700 km from Iran, within their operational range.
Fordow: the heart of Iran’s nuclear program
Built in the 2000s, the Fordow facility is a symbol of Iranian resilience. Located 96 km from Tehran, it remained secret until 2009, when Western agencies exposed its existence. Designed for uranium enrichment, the facility operates 80 to 90 meters beneath rock, protected by blast-proof doors and anti-aircraft systems. In 2023, the International Atomic Energy Agency (IAEA) detected uranium enriched to 83.7% at Fordow, close to the 90% needed for nuclear weapons, heightening global concerns.
Israel has previously struck other Iranian nuclear sites, such as Natanz, which suffered significant damage. However, Fordow remains a unique challenge. Its spiral tunnels may reach depths of up to 800 meters, according to IAEA Director Rafael Grossi. This structure makes the MOP the only conventional weapon capable of causing significant damage, though its full effectiveness is uncertain.
The American operation, per military sources, involved at least two MOPs dropped in sequence to maximize penetration. Drones and F-22 fighters accompanied the B-2s, neutralizing Iranian air defenses. Despite tactical success, analysts question whether the strike permanently disrupted Iran’s nuclear program, given the size and redundancy of its facilities.
Strategic impact of the strike
Direct US involvement in the conflict marks a significant shift. Since withdrawing from the nuclear deal in 2018 under the Trump administration, tensions with Iran have escalated. Israel, which bombed Iranian facilities in Arak, Natanz, and Bushehr in June 2025, relies on US support for high-complexity targets like Fordow. The decision to deploy the B-2 Spirit reflects pressure from Israel’s government, led by Benjamin Netanyahu, which has long sought access to the MOP.
The operation also sent a geopolitical message. In October 2024, then-Defense Secretary Lloyd Austin described a B-2 strike on Houthi targets as a demonstration of capability against fortified sites. The MOP’s use at Fordow reinforces the message that the US can strike any facility, regardless of its defenses.
- Iranian response: Tehran labeled the attack a sovereignty violation, vowing retaliation.
- IAEA concerns: The agency warned of risks of radiological contamination, though limited to the site.
- Limited stockpile: The US has about 20 MOPs, constraining large-scale operations.
- Logistical support: KC-135 tankers and Diego Garcia bases were critical to the mission.
The conflict’s future and US role
The partial destruction of Fordow does not guarantee the end of Iran’s nuclear program. Iran, which insists its activities are peaceful, has other facilities and tunnels under construction, such as those detected near Natanz in 2023. Its ability to enrich uranium to near-weapons-grade levels remains a threat, according to Israel and Western powers.
For the US, deploying the B-2 Spirit raises the stakes of escalation. Iran, backed by regional militias, could retaliate against US bases or allies. The operation also highlights Israel’s dependence on American military power, as its own bunker-buster bombs, like the GBU-28, penetrate only 6 meters of concrete, insufficient for Fordow.
The B-2 Spirit, with its unique capabilities, will remain a strategic asset. The US Air Force plans to integrate the MOP into the future B-21 Raider bomber, expanding its options. For now, the limited MOP stockpile and mission complexity restrict large-scale use.
Technology and challenges of the MOP
The Massive Ordnance Penetrator is an engineering marvel. Measuring 6 meters long and 80 cm in diameter, it carries 2.4 tons of AFX-757 explosives, optimized for confined targets. Its smart fuze, tested in 2024, adjusts detonation based on depth and target structure, enhancing effectiveness.
Challenges remain, however. Fordow’s dense rock composition may limit penetration. Iran’s air defenses require complex operations, involving defense suppression by fighters and drones. The MOP’s precision relies on detailed intelligence, which is not always available for covert targets like Fordow.
The June 13 operation, though successful, was untested on this scale before. Experts like Robert Pape note that dropping multiple bombs in the same spot during wartime is technically challenging. The US Air Force, however, expressed confidence in the B-2 and MOP’s ability to neutralize strategic targets.
Geopolitical tensions escalate
The Fordow strike intensified Middle East tensions. Israel, which conducted serial bombings against Iran in June 2025, sees US support as vital to countering Iran’s nuclear program. The US faces a dilemma: sustain military pressure or pursue diplomacy, which has failed since 2018.
The mobilization of US assets, including the USS Nimitz carrier and 30 KC-135 tankers in Europe, suggests preparations for prolonged operations. The B-2 presence in Diego Garcia, confirmed in April 2025, reinforces US readiness. Yet, Trump’s cautious rhetoric, avoiding details on future strikes, reflects the decision’s complexity.
Iran, despite damage to Fordow, maintains defiant rhetoric. Its ability to rebuild facilities and potential retaliation via proxy militias, like Hezbollah, keeps the conflict open. The international community, led by the IAEA, expresses concern over escalation but lacks consensus on halting Iran’s nuclear program.
The B-2 Spirit, with its blend of stealth and firepower, remains central to this geopolitical chessboard. Its role in Fordow demonstrated the reach of US military power but also exposed the limits of purely military solutions to such a complex issue.
