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What to Know About Bunker-Buster Bombs and Iran’s Fordo Nuclear Facility

In this photo released by the US Air Force on May 2, 2023, airmen look at a GBU-57, or the Massive Ordnance Penetrator bomb, at Whiteman Air Base in Missouri.(US Air Force via AP, File)
In this photo released by the US Air Force on May 2, 2023, airmen look at a GBU-57, or the Massive Ordnance Penetrator bomb, at Whiteman Air Base in Missouri.(US Air Force via AP, File)
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What to Know About Bunker-Buster Bombs and Iran’s Fordo Nuclear Facility

In this photo released by the US Air Force on May 2, 2023, airmen look at a GBU-57, or the Massive Ordnance Penetrator bomb, at Whiteman Air Base in Missouri.(US Air Force via AP, File)
In this photo released by the US Air Force on May 2, 2023, airmen look at a GBU-57, or the Massive Ordnance Penetrator bomb, at Whiteman Air Base in Missouri.(US Air Force via AP, File)

If the US decides to support Israel more directly in its attack on Iran, one option for Washington would be to provide the "bunker-buster" bombs believed necessary to significantly damage the Fordo nuclear fuel enrichment plant, built deeply into a mountain.

Such a bomb would have to be dropped from an American aircraft, which could have wide-ranging ramifications, including jeopardizing any chance of Iran engaging in Trump's desired talks on its nuclear program. Israeli officials have also suggested that there are other options for it to attack Fordo as it seeks to destroy Iran's nuclear capabilities.

But aside from a commando attack on the ground or a nuclear strike, the bunker buster bomb seems the most likely option.

What is the bunker-buster bomb? "Bunker buster" is a broad term used to describe bombs that are designed to penetrate deep below the surface before exploding. In this case, it refers to the latest GBU-57 A/B Massive Ordnance Penetrator bomb in the American arsenal. The roughly 30,000 pound (13,600 kilogram) precision-guided bomb is designed to attack deeply buried and hardened bunkers and tunnels, according to the US Air Force.

It's believed to be able to penetrate about 200 feet (61 meters) below the surface before exploding, and the bombs can be dropped one after another, effectively drilling deeper and deeper with each successive blast.

The bomb carries a conventional warhead, but the International Atomic Energy Agency has confirmed that Iran is producing highly enriched uranium at Fordo, raising the possibility that nuclear material could be released into the area if the GBU-57 A/B were used to hit the facility.

However, Israeli strikes at another Iranian nuclear site, Natanz, on a centrifuge site have caused contamination only at the site itself, not the surrounding area, the IAEA has said.

How tough a target is Fordo? Fordo is Iran's second nuclear enrichment facility after Natanz, its main facility. So far, Israeli strikes aren’t known to have damaged Natanz’s underground enrichment hall, nor have the Israelis targeted tunnels the Iranians are digging nearby.

Fordo is smaller than Natanz, and is built into the side of a mountain near the city of Qom, about 60 miles (95 kilometers) southwest of Tehran. Construction is believed to have started around 2006 and it became first operational in 2009 — the same year Tehran publicly acknowledged its existence.

In addition to being an estimated 80 meters (260 feet) under rock and soil, the site is reportedly protected by Iranian and Russian surface-to-air missile systems. Those air defenses, however, likely have already been struck in the Israeli campaign.

Still, Israeli Prime Minister Benjamin Netanyahu has said the goal of attacking Iran was to eliminate its missile and nuclear program, which he described as an existential threat to Israel, and officials have said Fordo was part of that plan.

"This entire operation ... really has to be completed with the elimination of Fordo," Yechiel Leiter, Israel's ambassador to the US, told Fox News on Friday.

Why does the US need to be involved? In theory, the GBU-57 A/B could be dropped by any bomber capable of carrying the weight, but at the moment the US has only configured and programed its B-2 Spirit stealth bomber to deliver the bomb, according to the Air Force.

The B-2 is only flown by the Air Force, and is produced by Northrop Grumman.

According to the manufacturer, the B-2 can carry a payload of 40,000 pounds (18,000 kilograms) but the US Air Force has said it has successfully tested the B-2 loaded with two GBU-57 A/B bunker busters — a total weight of some 60,000 pounds (27,200 kilograms).

The strategic long-range heavy bomber has a range of about 7,000 miles (11,000 kilometers) without refueling and 11,500 miles (18,500 kilometers) with one refueling, and can reach any point in the world within hours, according to Northrop Grumman.

Whether the US would get involved is another matter.

At the G7 meeting in Canada, Trump was asked what it would take for Washington to become involved militarily and he said: "I don't want to talk about that."

In a weekend interview with ABC News, Israeli Ambassador Leiter was asked about the possibility of the US helping attack Fordo and he emphasized Israel has only asked the US for defensive help.

"We have a number of contingencies ... which will enable us to deal with Fordo," he said.

"Not everything is a matter of, you know, taking to the skies and bombing from afar."

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Is US Military Cooperation with Ethiopia Driven by Anger over Egypt-China Rapprochement?

US President Donald Trump during his meets with Egyptian President Abdel Fattah al-Sisi on the sidelines of the 73rd session of the UN General Assembly in September 2018. (Egyptian Presidency)
US President Donald Trump during his meets with Egyptian President Abdel Fattah al-Sisi on the sidelines of the 73rd session of the UN General Assembly in September 2018. (Egyptian Presidency)
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Is US Military Cooperation with Ethiopia Driven by Anger over Egypt-China Rapprochement?

US President Donald Trump during his meets with Egyptian President Abdel Fattah al-Sisi on the sidelines of the 73rd session of the UN General Assembly in September 2018. (Egyptian Presidency)
US President Donald Trump during his meets with Egyptian President Abdel Fattah al-Sisi on the sidelines of the 73rd session of the UN General Assembly in September 2018. (Egyptian Presidency)

A US defense agreement with Ethiopia was announced days before an important visit by Chinese President Xi Jinping to Cairo that saw agreements and memorandums of understanding signed in several fields and coincided with joint Egyptian-Chinese air exercises.

The timing raised questions over whether Washington’s military cooperation with Addis Ababa was driven by “US anger at Cairo” and what objectives it serves amid tensions in the Horn of Africa.

The United States and Ethiopia signed a defense agreement on Aug. 21 during an official visit by an Ethiopian military delegation to Washington. Both sides described it as a strategic framework aimed at strengthening military and security cooperation, protecting national interests and securing mutual benefits.

Raafat Mahmoud, head of the African Affairs Research Unit at the Egyptian Cabinet's Information and Decision Support Center (IDSC), told Asharq Al-Awsat that Washington was seeking to rebuild ties with Addis Ababa after years of tension, particularly over the Tigray war and US criticism of Ethiopia’s human rights record.

He argued that the agreement showed Ethiopia had become part of broader US calculations involving Red Sea security, countering Chinese and Russian influence and combating armed groups in the Horn.

Ethiopian lawmaker Mohammed Al-Arusi noted that Washington views the Horn as directly linked to Red Sea security, international trade and maritime routes, while also facing terrorist threats.

“Ethiopia lies at the heart of this geography, with its demographic, political and military weight across a broad region, and it hosts the permanent headquarters of the African Union,” he told Asharq Al-Awsat. Washington, he added, was not seeking a temporary stance but it is “rebuilding its position in a region where the balance of power is changing.”

US Republican and strategic affairs expert Adolfo Franco cautioned that the agreement lacks formally binding treaties and direct financial funding, adding that future defense exports remain subject to strict restrictions and case-by-case assessments, including human rights considerations.

Al-Arusi pointed to a US-Ethiopian dialogue launched in May covering economics, trade, investment, defense and security. The defense track advanced just three months later, a sequence he said showed Washington was approaching Ethiopia with long-term considerations.

Mahmoud said growing US support could strengthen Ethiopia’s negotiating position not only on water but also in its efforts to secure maritime access and expand its presence in the Red Sea region.

Recent media reports have portrayed the US-Ethiopian rapprochement as Washington’s response to Egypt’s growing ties with China, highlighted by Xi’s visit to Cairo this week.

Mahmoud countered that Egyptian-Chinese rapprochement was not new, although recent developments naturally raised sensitivities in Washington, particularly amid expanding economic and security cooperation.

In January 2026, Ethiopia and China elevated their relations to an “all-weather strategic partnership,” nearly two years after Egypt and China upgraded their ties to a “strategic partnership” in 2024.

Al-Arusi argued that Washington’s expanding partnership with Addis Ababa should not be viewed as replacing one partner with another, but rather as evidence of Ethiopia’s growing strategic value.

Former US diplomat Henry Ensher told Asharq Al-Awsat that Washington wants a security partner in the Horn and that Ethiopia is the best option given its capabilities.

While China and the United States compete in Africa, Egypt is the more important partner, he said, making it unlikely that Washington would use this approach to confront or punish Cairo.

Features

Syrian Official to Asharq Al-Awsat: Integration Process Following SDF Dissolution Is Moving Toward Completion

A convoy of Syrian security forces and Special Operations Forces enters the headquarters of the “Vanguards Camp” Regiment in Hasakah (Hasakah Media)
A convoy of Syrian security forces and Special Operations Forces enters the headquarters of the “Vanguards Camp” Regiment in Hasakah (Hasakah Media)
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Syrian Official to Asharq Al-Awsat: Integration Process Following SDF Dissolution Is Moving Toward Completion

A convoy of Syrian security forces and Special Operations Forces enters the headquarters of the “Vanguards Camp” Regiment in Hasakah (Hasakah Media)
A convoy of Syrian security forces and Special Operations Forces enters the headquarters of the “Vanguards Camp” Regiment in Hasakah (Hasakah Media)

Ahmad al-Hilali, deputy governor of Hasakah, told Asharq Al-Awsat on Friday that the integration process stipulated in the “January 29, 2026 Agreement” has moved, following the dissolution of the Syrian Democratic Forces (SDF) and the former Kurdish Autonomous Administration, from “the stage of understandings and negotiations to actual implementation, whether in civilian institutions or in the security and military sectors.”

He described the security situation as “much better” and said “stability is gradually strengthening,” stressing that the process “is moving toward completion, and what we want is for it to take place calmly.”

Since SDF commander Mazloum Abdi announced from the presidential palace in Damascus on August 25 the dissolution of the SDF and the Autonomous Administration, Hasakah has witnessed a series of developments and changes signaling the emergence of a new phase in the governorate. Its defining features are the restoration of state authority across all sectors, stronger security and stability, the unification of institutions, and the end of administrative duplication, in accordance with the January 29 Agreement.

In his remarks, al-Hilali said that “the integration process is not simply a matter of transferring buildings or changing names. It is about reunifying institutional authority, administrative decision-making, and security and military command under the umbrella of the Syrian state.”

He said significant steps had already been completed in this direction, while work was underway to address the remaining files in an orderly manner that would prevent any institutional or security vacuum and preserve stability in the governorate.

Before the announcement of the SDF's dissolution, most cities and areas in Hasakah had experienced security disorder involving the Revolutionary Youth. Such incidents increased after the signing of the January 29 Agreement, when members of the group prevented the handover of institutions to the government. That situation, however, has now disappeared.

Al-Hilali attributed the disappearance of the previous unrest primarily to the fact that “the phase has changed.”

“Previously, there were attempts to obstruct the process of transferring state institutions, and some activities emerged aimed at disrupting this course. But as implementation of the agreement progressed and the direction toward ending institutional and security duplication became clear, these manifestations declined significantly,” he said.

According to al-Hilali, “There is now a growing conviction among everyone that state institutions should not be a subject of conflict or confrontation, and that the integration process is moving toward completion.”

“What we want is for this process to take place calmly, away from provocation and tension, and for all residents of the governorate to feel that the return of state institutions means the return of services, the rule of law and stability, and is not directed against any component of society,” he said.

Asked when the integration of military, security and civilian institutions would be fully completed, the deputy governor said: “I do not want to set an artificial date for a process of this scale and complexity, because some files require technical, administrative and security procedures before they can be formally closed.”

He added: “But I can say that we are at a very advanced stage and that the overall direction is clearly toward completing the integration as soon as possible.”

He noted that “the bulk of the work is now in the implementation phase, while what remains consists of detailed files requiring the completion of arrangements, verification and coordination among the ministries and relevant authorities.”

Women fighters from the Women's Protection Units (YPJ) take part in military traning in Hasakah, Syria, August 22, 2026. REUTERS/Orhan Qereman

Pending Files

Al-Hilali said: “What matters most to us is that the integration be complete, genuine and sustainable, rather than merely a political announcement whose impact fades after a short period.”

Asked about the main outstanding issues preventing the completion of the integration process, al-Hilali said the remaining files could be divided into three main tracks.

“First is the military and security file, involving the completion of the restructuring of personnel and cadres and the integration of those who meet the requirements into the Ministries of Defense and Interior in accordance with the established procedures,” he said.

“The second is the administrative and civilian file, particularly the status of employees and staff, the mechanisms for confirming their positions and paying their entitlements, and the integration of institutions and departments whose transfer to the state has not yet been completed.”

“The third involves a number of service-related, technical and administrative files linked to the transfer of powers and the reunification of operating systems, databases and resources.”

Al-Hilali said these issues “do not represent an obstacle to the integration process so much as they are implementation files that need to be completed.”

“The political decision is clear and the overall direction has been settled: state institutions will be unified, authority will rest with the Syrian state, and the rights of all citizens and components of the governorate will be preserved,” he said.

The rise of the Autonomous Administration

The first foundations of the Kurdish Autonomous Administration, which sought to establish a “Kurdish project in Syria,” emerged through the formation of the Kurdish Supreme Committee. It was established by Syria's Kurdish Democratic Union Party (PYD) and the Kurdish National Council following the signing of the Erbil Agreement on July 12, 2012.

A military wing was subsequently established for the committee, comprising the People's Protection Units (YPG), the Women's Protection Units (YPJ) and the Asayish security forces. The SDF was later formed in 2015, under predominantly Kurdish leadership.

The geographic footprint of the Autonomous Administration expanded from three cantons in 2014 to six in 2016 and seven by 2023. This territorial expansion was accompanied by the growth of its military and security apparatus and civilian institutions, which collectively included tens of thousands of personnel.

The SDF subsequently lost a significant portion of its territory during armed clashes that erupted between its fighters and the Syrian army in late 2025 and early 2026. The fighting lasted about two weeks and was followed by the signing of the January 29, 2026 Agreement.

The agreement between the Syrian government and the SDF called for a ceasefire and the gradual integration into Syrian state institutions of the military and civilian institutions established by the Kurds during the years of conflict. It also called for the handover of border crossings and oil and gas fields, as well as the withdrawal of foreign fighters from the region.

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Lebanon's Ali Al-Taher Ridge, Strategic Hezbollah Position Israel Says It Seized

31 August 2026, Lebanon, Arnoun: Smoke billows after an Israeli detonation on Arnoun, not far from the strategic hill of Ali al-Taher ridge. (dpa)
31 August 2026, Lebanon, Arnoun: Smoke billows after an Israeli detonation on Arnoun, not far from the strategic hill of Ali al-Taher ridge. (dpa)
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Lebanon's Ali Al-Taher Ridge, Strategic Hezbollah Position Israel Says It Seized

31 August 2026, Lebanon, Arnoun: Smoke billows after an Israeli detonation on Arnoun, not far from the strategic hill of Ali al-Taher ridge. (dpa)
31 August 2026, Lebanon, Arnoun: Smoke billows after an Israeli detonation on Arnoun, not far from the strategic hill of Ali al-Taher ridge. (dpa)

Southern Lebanon's Ali al-Taher ridge, which the Israeli army on Thursday said it captured, was a strategic position for Iran-backed Hezbollah, where it was believed to have established a command center.

Hezbollah did not confirm losing the highland, which is around 10 kilometers (six miles) from the border with Israel and was targeted by several Israeli strikes in recent weeks despite a ceasefire.

The ridge, a flashpoint since Hezbollah drew Lebanon into the Middle East war in March, lies close to the major city of Nabatieh and the Litani River.

It is just a few kilometers from UNESCO-listed Beaufort castle, another strategic site that Israel captured in recent months and continues to occupy.

Ali al-Taher ridge, on the edge of the Israeli-proclaimed occupied "security zone", overlooks surrounding areas and key districts further north, and sits atop a network of tunnels.

During US-mediated negotiations between Lebanon and Israel, Washington proposed the Lebanese military take over the ridge, but Hezbollah refused, according to a source close to the talks.

Military expert Riad Kahwaji told AFP that the ridge is "in between several villages and adjacent to the city of Nabatieh" with a "web of tunnels (that) connects these villages around it".

On Friday, Israeli Defense Minister Israel Katz said the capture "marks the completion of the phase of securing control in the security zone in southern Lebanon", meaning the Lebanese territory Israel occupied during the war.

- 'Command centers' -

The Israeli military on Thursday said that the tunnel network included "command centers (and) weapons storage rooms".

"The infrastructure is a strategic underground network that was built over two decades and funded and planned by the Iranian terror regime," it added.

Kahwaji, who heads the INEGMA military analysis institute, said the hilltops overlook Iqlim al-Tuffah, an area further from the border where Hezbollah holds sway, as well as part of the country's east.

Control of the area would therefore "give the Israelis an easy passage to move on both sides".

Speaking to journalists including AFP last month, Hezbollah spokesman Youssef al-Zein refused to say how many of the group's fighters were at the Ali al-Taher position. He denied any Iranian personnel were there, as had been reported in some media outlets.

He claimed that Israel had "exaggerated the importance of Ali al-Taher" as a military objective but also vowed that Hezbollah would "defend this position as much as it can".

The ridge is located right above the Litani. Hezbollah agreed to disarm in areas south of the river under a 2024 ceasefire that sought to end its previous war with Israel.

Two years later, Hezbollah dragged Lebanon into the broader Middle East war by attacking Israel in support of Iran.

Israel responded with airstrikes and a ground invasion that Lebanon says have killed more than 4,300 people.

The conflict has calmed since a US-Iran memorandum of understanding and a framework agreement between Lebanon and Israel agreed in June. But Israeli strikes continue and violence persisted around Ali al-Taher.

On August 15, Israel's army launched its deadliest strikes in weeks in response to what it said was a Hezbollah attack against its soldiers in the area.

In June, Israel's army published an updated map showing the parts of south Lebanon it considers within its "security zone" where its troops are operating, expanding the area to include the Ali al-Taher ridge.