Revealed: How Trump 'backed out of nuking Iran because only a tactical nuclear weapon would destroy Fordow bunker' - as Kremlin issues nuclear war warning

Revealed: How Trump 'backed out of nuking Iran because only a tactical nuclear weapon would destroy Fordow bunker' - as Kremlin issues nuclear war warning
By: dailymail Posted On: June 20, 2025 View: 37

Donald Trump told defence officials it would only make sense for the U.S. to join Israel in striking Iran if its 'bunker buster' bombs are guaranteed to be able to destroy the key enrichment site at Fordow, according to people familiar with the discussions.

Officials were said to have been told that the U.S. would have to soften the ground with conventional bombs before dropping a tactical nuclear weapon from a B2 Bomber to completely destroy the site, believed to be some 90 metres underground.

But Trump is said to have ruled out nuking Iran, insiders told the Guardian. The possibility was said not to have been raised by defence secretary Pete Hegseth or chairman of the joint chiefs of staff General Dan Caine during recent meetings in the Situation Room.

Trump said late on Thursday that he will now decide in the next two weeks whether to join in military action against Iran, before British and European diplomats were to meet with Iran's Foreign Minister Abbas Araghchi in Geneva on Friday.

Russia warned today that any use of tactical nuclear weapons in Iran would be 'catastrophic' amid fears it could spark wider conflict across the Middle East.

Live updates below 

U.S. 'remains open to dialogue with Iran'

Diplomats are meeting in Geneva today to begin talks around the Iran crisis and Tehran's nuclear programme.

Initial talks are not expected to yield major progress towards peace. But they could carve out a space for dialogue between Iran and the U.S., mediated by Britain and Europe.

Russia, too, has been eyeing a mediating role in the growing crisis.

France's foreign minister, Jean-Noel Barrot, is said to have already spoken to U.S. Secretary of State Marco Rubio on the sidelines.

A French diplomatic source told The Guardian that Rubio emphasised that the U.S. is 'ready for direct contact with the Iranians at any moment'.

Trump would only join strikes on Iran if U.S. can avoid using nuclear weapons, officials say

Donald Trump told defence officials it would only make sense for the U.S. to join Israel in striking Iran if its 'bunker buster' bombs are guaranteed to be able to destroy the key enrichment site at Fordow, according to people familiar with the discussions.

Officials were said to have been told that the U.S. would have to soften the ground with conventional bombs before dropping a tactical nuclear weapon from a B2 Bomber to completely destroy the site, believed to be some 90 metres underground.

But Trump is said to have ruled out nuking Iran, insiders told the Guardian. The possibility was said not to have been raised by defence secretary Pete Hegseth or chairman of the joint chiefs of staff General Dan Caine during recent meetings in the Situation Room.

Trump said late on Thursday that he will now decide in the next two weeks whether to join in military action against Iran, before British and European diplomats were to meet with Iran's Foreign Minister Abbas Araghchi in Geneva on Friday.

Russia warned today that any use of tactical nuclear weapons in Iran would be 'catastrophic' amid fears it could spark wider conflict across the Middle East.

ANKARA, TURKIYE - JUNE 18: An infographic titled

Pictures: Israeli bomb disposal experts at scene of latest Iran strike

These pictures show Israeli bomb experts at the scene of the latest Iranian ballistic missile attack in southern Israel today.

For the second day in a row Beersheba has come under attack as the missile struck a road near several apartment blocks.

The strike has created a large crater and caused several cars to catch alight. The Times of Israel is reporting seven people suffered minor injuries with some substantial damage to homes.

BEERSHEBA, ISRAEL - JUNE 20: Israeli police officers and bomb disposal experts are seen working at the impact site after a missile reportedly launched from Iran struck the southern Israeli city of Beersheba on June 20, 2025. Authorities began investigations following the incident as part of broader security measures amid ongoing regional tensions. (Photo by Mostafa Alkharouf/Anadolu via Getty Images)
BEERSHEBA, ISRAEL - JUNE 20: Israeli police officers and bomb disposal experts are seen working at the impact site after a missile reportedly launched from Iran struck the southern Israeli city of Beersheba on June 20, 2025. Authorities began investigations following the incident as part of broader security measures amid ongoing regional tensions. (Photo by Mostafa Alkharouf/Anadolu via Getty Images)
A member of the Israeli security forces checks the destruction at site of an Iranian missile attack in a residential area in Beersheba in southern Israel, on June 20, 2025. Israel and Iran exchanged fire again on June 20, a week into the war between the longtime enemies. (Photo by MAYA LEVIN / AFP) (Photo by MAYA LEVIN/AFP via Getty Images)

Donald Trump 'increasingly relying on a small group of advisors' for input on Iran

Donald Trump is said to be increasingly relying on a small group of advisors for input on Iran as he debates whether or not to join Israel's military action.

Two defence officials and a senior administration official told NBC News that the U.S. President has closed his inner circle in a report published on Friday.

Another senior administrational official said that while Trump routinely crowdsources for ideas, he is listening to only a handful of officials for decision-making.

These include his Vice President, chief of staff, deputy chief of staff and Secretary of State, the official said.

Trump was also said to have sidelined National Intelligence Director Tulsi Gabbard, who opposes strikes in Iran.

And he has not been leaning on Defense Secretary Pete Hegseth, officials said.

The possibility of kinetic action against Iran remains deeply divisive within the administration and without.

Mandatory Credit: Photo by Shutterstock (15364252p) United States President Donald J Trump answers reporters questions during a meeting with members of the Juventus soccer club in the Oval Office of the White House in Washington, DC, US,. President Trump Holds a Meeting with Members of the Juventus Soccer Club, Washington, District of Columbia, USA - 18 Jun 2025

United States President Donald J Trump on June 18

Iran refusing to talk to US because it is 'partner' in Israeli 'crimes'

This handout picture provided by the Iranian foreign ministry shows Iran's Foreign Minister Abbas Araghchi meeting with ambassadors of foreign countries in Tehran on June 15, 2025. Israel and Iran traded heavy fire for a third straight day on June 15, with mounting casualties and expanding targets marking a sharp escalation in hostilities between the longtime foes. (Photo by Iran's Ministry of Foreign Affairs / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT

Iranian foreign minister Abbas Araghchi has claimed Tehran has refused talks with Washington because it is a 'partner' in Israeli 'crimes'.

Speaking on state television, Araghchi said Iran is not planning any contact with the US for the time being.

His remarks come just hours after the White House indicated Donald Trump will decide whether or not the US gets directly involved in the conflict within the next two weeks.

Araghchi said that while negotiations with the US are not on the horizon, Iran had no issue engaging with other countries as officials meet European leaders in Geneva later today.

The minister said those talks were limited to nuclear and regional issues and that Iran will not negotiate regarding its missile capabilities.

Khondab reactor damaged - but no 'radiological consequence', UN's nuclear watchdog says

The Iranian Khondab heavy water research reactor was damaged in Israeli strikes on Thursday, but no 'radiological consequence' is expected, the International Atomic Energy Agency said.

The UN's nuclear watchdog assessed that because the facility was still under construction and not operational, it contained no nuclear material.

Rafael Grossi assured that, as a result, no radiological consequence was expected.

Reactors like the facility near the city of Arak can be used for scientific purposes, but will create plutonium as a byproduct. This could be used for nuclear weapons.

Not the time for popular uprising as Israeli strikes continue, dissidents say

Iran's fragmented opposition groups think their moment may be close at hand, but activists involved in previous bouts of protest say they are unwilling to unleash mass unrest, even against a system they hate, with their nation under attack.

Exiled opponents of the Islamic Republic, themselves deeply divided, are urging street protests. In the borderlands, Kurdish and Baluchi separatist groups look poised to rise up, with Israeli strikes pummelling Iran's security apparatus.

While the Islamic Republic looks weaker than at nearly any point since soon after the 1979 revolution, any direct challenge to its 46-year rule would likely require some form of popular uprising.

Triggering regime change is certainly one war goal for Israel, with Prime Minister Benjamin Netanyahu addressing Iranians to say 'we are also clearing the path for you to achieve your freedom'.

But while Israeli strikes have targeted a security hierarchy that crushed previous bouts of protest, they have also caused great fear and disruption for ordinary people - and anger at both Iranian authorities and Israel, the activists said.

FILE PHOTO: Smoke rises following an Israeli attack on the IRIB building, the country's state broadcaster, in Tehran, Iran, June 16, 2025. Majid Asgaripour/WANA (West Asia News Agency) via REUTERS   ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY/File Photo

Smoke rises following an Israeli attack on the IRIB building, the country's state broadcaster, in Tehran, Iran, June 16, 2025.

TEHRAN, IRAN - JUNE 19: The Iranian Red Crescent ambulance targeted in the Israeli attack on June 16 in Iran's West Azerbaijan province, in which two healthcare workers lost their lives, is being displayed in Haft-e Tir Square in Tehran, Iran on June 19, 2025. (Photo by Fatemeh Bahrami/Anadolu via Getty Images)

The Iranian Red Crescent ambulance targeted in the Israeli attack on June 16 in Iran's West Azerbaijan province, in which two healthcare workers lost their lives, is being displayed in Haft-e Tir Square in Tehran, Iran on June 19, 2025

'How are people supposed to pour into the streets? In such horrifying circumstances, people are solely focused on saving themselves, their families, their compatriots, and even their pets,' said Atena Daemi, a prominent activist who spent six years in prison before leaving Iran.

One activist, who was jailed for five months after the 2022 protests over the death in custody of Mahsa Amini, said she believed in regime change in Iran but that it was not time to take to the streets.

She and her friends were not planning to stage or join rallies, she said, and dismissed calls from abroad for protests. 'Israel and those so-called opposition leaders abroad only think about their own benefit,' she said.

Foreign Secretary heads to Geneva for nuclear talks

British Foreign Secretary David Lammy is to join with top European diplomats and Iran's Foreign Minister Abbas Araghchi in Geneva on Friday to discuss Iran's nuclear programme.

Foreign ministers from France, Germany, Britain and the EU are urging de-escalation, with David Lammy saying the next two weeks are 'a window... to achieve a diplomatic solution'.

Lammy yesterday met with American Secretary of State Marco Rubio and U.S. Middle East envoy Steve Witkoff at the White House.

Al Jazeera, reporting from Washington, reports: 'We're told that Lammy came away with a genuine feeling that Trump does want to see a deal [with Iran]'.

After days of escalatory comments suggesting the U.S. could join Israel in its hitherto unilateral strikes against Iran, Donald Trump decided overnight to open a two-week negotiating window before deciding on striking Iran.

'Based on the fact that there's a substantial chance of negotiations that may or may not take place with Iran in the near future, I will make my decision whether or not to go within the next two weeks,' a readout from Trump said, shared late Thursday.

Leaders will today convene in Geneva to see if there is a way back to the negotiating table, after talks in Oman were called off.

'I've received several phone calls reassuring me that the Zionist regime [Israel] would not target' Araghchi en route to Geneva, his adviser Mohammad Reza Ranjbaran said on X.

Separately, the UN Security Council is also due to convene on Friday for a second session on the conflict, at Iran's request with support from Russia, China and Pakistan, a diplomat told AFP on Wednesday.

Foreign Secretary David Lammy leaves Downing Street, London. Prime Minister Sir Keir Starmer has called an emergency Cobra committee today to discuss the security situation in the Middle East, the PA news agency understands. Picture date: Wednesday June 18, 2025. PA Photo. Photo credit should read: Jonathan Brady/PA Wire

Foreign Secretary David Lammy leaves Downing Street, London on Wednesday, June 18

Lebanon will not enter the war, assures top politician

'I am 200 per cent sure Lebanon will not enter the war,' senior politician and parliament speaker Nabih Berri told local MTV News last night.

'It has no interest in doing so and would pay a heavy price. Iran does not need us. It is Israel that needs support.'

Israel has been cautioning Iranian proxy group Hezbollah not to involve itself as Israel and Iran continue to exchange blows.

Late last year, Israel and Hezbollah agreed to terms that would see Hezbollah retract and more Lebanese army troops brought in to patrol the border with the U.N.

Israel has nonetheless continued strikes into Lebanon, hitting southern Beirut on the eve of Eid Al Adha earlier this month.

The military claimed it had identified a Hezbollah unit producing 'thousands' of drones underground, funded by 'Iranian terrorists'.

Senior Khamenei advisor, reported dead, is 'alive and ready to sacrifice myself'

Ali Shamkhani, a senior advisor to Iran's supreme leader Ayatollah Ali Khamenei, is alive and in a stable condition, according to Iranian media, after being reported dead earlier this week.

Shamkhani was said to have been seriously wounded in an Israeli attack a week ago. Iranian state TV network IRINN reported that he succumbed to injuries and died.

But now the semi-official Tasnim news agency, based in Iran, has quoted him as having said 'I am alive and ready to sacrifice myself' in a message to the Ayatollah and the Iranian nation.

Ali Shamkhani - head of the Iranian nuclear program and senior advisor to Supreme Leader Khamenei, likely eliminatedhttps://x.com/MOSSADil/status/1933351229326782869

Shamkhani, a close aide to the Ayatollah Khamenei, was reported to have died earlier this week. Now, Iranian media says he is alive and 'ready to sacrifice myself'.

Iran responds with missile strikes near Israeli military branch in Beersheba

Iranian missiles struck near a military branch in Israel's Beersheba (Be'er Sheva) on Friday, Al Jazeera is reporting.

Strikes were said to have damaged a Microsoft office in the Gav-Tam Negev advanced technologies park.

The park borders Ben Gurion University and the C4i branch campus of the Israeli army, its telecoms branch, the Qatari outlet says, noting the strikes would have come down before typical business hours.

Seven people are reported to have been injured in the attack.

Emergency personnel work next to burnt cars and damaged residential buildings at an impact site following Iran's missile strike on Israel, in Be'er Sheva, Israel, June 20, 2025. REUTERS/Amir Cohen

Emergency personnel work next to burnt cars and damaged residential buildings at an impact site following Iran's missile strike on Israel, in Be'er Sheva, Israel, June 20

Israeli soldiers work next to a damaged residential building at an impact site following Iran's missile strike on Israel, in Be'er Sheva, Israel, June 20, 2025. REUTERS/Amir Cohen

Israeli soldiers work next to a damaged residential building at an impact site following Iran's missile strike on Israel, in Be'er Sheva, Israel, June 20

Israel warns Hezbollah: Do not get involved

Israeli Defence Minister Israel Katz warned Lebanon's Hezbollah to exercise caution on Friday, saying Israel's patience with 'terrorists' who threaten it had worn thin.

The head of Iran-backed Hezbollah, Naim Qassem, said on Thursday that the Lebanese group would act as it saw fit in the face of what he called 'brutal Israeli-American aggression' against Iran.

Hezbollah's military leadership was vanquished late last year after Israel launched a ground invasion of Lebanon to oust the Iranian-proxy group, citing failure to uphold the terms of a long-established ceasefire agreement.

An even heavier blow to Hezbollah was the fall in December of Syria's Bashar Assad when Sunni rebels marched on the capital and removed him from power. Now, a government hostile to Iran and Hezbollah rules from Damascus.

Supporters of Iraq's Hezbollah Brigades attend a gathering to condemn Israel's attack on Iran in the city of Nasiriyah, in Iraq's southern Dhi Qar province on June 19, 2025. (Photo by Asaad NIAZI / AFP) (Photo by ASAAD NIAZI/AFP via Getty Images)

Supporters of Iraq's Hezbollah Brigades attend a gathering to condemn Israel's attack on Iran in the city of Nasiriyah, in Iraq's southern Dhi Qar province on June 19, 2025

Fresh strikes rock Tehran as Israel claims attacks on missile production sites

Israel's military said on Friday that it had struck dozens of targets in Tehran overnight, including what it called a centre for the 'research and development of Iran's nuclear weapons project'.

In a statement, the army said it had 'completed a series of strikes in the heart of Tehran' as the crisis entered its eighth day.

'Dozens of targets were struck, including military missile production sites and the SPND (Organisation of Defensive Innovation and Research) headquarters for research and development of Iran's nuclear weapons project,' it claimed.

According to the Israeli military the SPND headquarters 'is used for research and development of advanced technologies and weapons supporting the Iranian regime's military capabilities.'

The army said that during the night on Thursday more than 60 fighter jets struck dozens of military targets.

'Among the targets were sites producing missile components and facilities manufacturing raw materials used in casting missile engines,' it added.

The military also said it intercepted overnight four UAVs launched from Iran.

Using tactical nukes to destroy Fordow would be 'catastrophic', warns Russia

American use of tactical nuclear weapons in the Middle East would lead to catastrophic consequences, Kremlin spokesperson Dmitry Peskov told the Russian TASS news agency.

'There have been a lot of speculations,' Peskov caveated, responding to media reports that Washington had not yet ruled out the use nuclear weapons to attack the entrenched underground Fordow enrichment site in Iran.

'This would be a catastrophic development,' he said. 'But there are so many speculations that in fact, it's impossible to comment on them.'

Fordow remains the most heavily defended known enrichment site in Iran, buried some 80 to 90 metres underground.

Israel is believed to lack the capability to destroy the site with its current arsenal, though insiders have suggested multiple raids could weaken the site.

The American B-2 Spirit bombers, capable of carrying GBU-57 Massive Ordnance Penetrators (MOPs), could deal heavy damage - though would require U.S. intervention.

Russia has presented itself as a possible mediating force between U.S.-backed Israel and Iran in recent days, though U.S. President Donald Trump has publicly been reluctant to accept the offer.

Russia's nuke warning to Trump as Israel-Iran conflict enters eighth day

Good morning and welcome to MailOnline's live coverage of the Iran-Israel conflict as it enters its eighth day.

Russia has today warned America any use of tactical nuclear weapons in Iran would be 'catastrophic' as it wades into the situation in the Middle East.

Russian news service Tass is reporting the Kremlin has issued a fresh plea for Trump to avoid using bunker busting bombs on Iranian nuclear facilities

It comes as Donald Trump will decide within the next two weeks on whether the U.S. will conduct a strike on Iran.

Stick with us for the latest updates throughout the day plus the most eye-catching pictures and videos

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