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Fresh activity emerges at Iran’s deeply buried nuclear site as Trump warns Iran not to ‘get cute’

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Cite

Lachter, E. (2026, September 17). Fresh activity emerges at Iran’s deeply buried nuclear site as Trump warns Iran not to ‘get cute’. Fox News. https://www.foxnews.com/world/fresh-activity-emerges-irans-deeply-buried-nuclear-site-trump-warns-iran-not-get-cute

Dated when The Aporia collected the article, usually within hours of publication. Check the original for its exact date and byline.

Fox News · collected 2026-09-17 · by Efrat Lachter

Quick Summary

Satellite imagery from September 11 shows Iran adding new defenses at Pickaxe Mountain, a deeply buried nuclear-linked site near Natanz, including earthen roadblocks and soil covering tunnel entrances, possibly to protect against aerial bombardment. President Trump recently warned Iran not to "get cute" with the site, suggesting potential military action if necessary. The U.S.-drafted Security Council resolution aimed at maintaining international sanctions monitoring was vetoed by Russia and China on Thursday.
Written by AI on 2026-09-17, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

New satellite images show Iran has fortified tunnel entrances at Pickaxe Mountain, a deeply buried nuclear site, with earthen roadblocks and additional soil layers to protect against airstrikes. The Institute for Science and International Security reported on September 15 that these defenses reinforce the assessment that the facility is inactive but may house valuable equipment or materials. This development follows President Donald Trump's warning last week to Iran not to "get cute," implying serious consequences if Iran does not comply with international demands. The U.S.-drafted UN resolution aimed at maintaining sanctions monitoring on Tehran was vetoed by Russia and China, complicating diplomatic efforts. Additionally, the report noted signs of reconstruction at another sensitive site, Taleghan 2 in Parchin, suggesting ongoing activity in Iran's nuclear infrastructure.

Written for “Iran Nuclear Site Activity Increases” on 2026-11-03, grounded in this article and the 1 other(s) covering the same event.

Story

📰 Iran Nuclear Site Activity Increases
Politics · 2 article(s) covering the same event. See how they differ ↓

Compared with similar articles

This article reads unscored and hedges 15% of its claims. Each row says how that neighbour differs.
South China Morning Post
⚖️ Leans right Hedges 3 of 4 claims Outlet record 62/100
“The articles discuss Iran's nuclear site activity but refer to different dates and details, suggesting they cover related developments rather than a single specific incident.”
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
39
sentences that state something as happening or true
Uncertain
15%
6 of 39 hedged ("reportedly", "may", "according to")
Leaning
withheld
no quote in the article backed the model's score
Publisher signals
69/100
Fox News's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
2
Politics
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-09-17 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

Fox News · 6392 article(s) · 11 correction(s) detected
Running correction rate · 11 correction(s)

Who wrote this

Efrat Lachter
29 article(s) here · 1 carrying a prediction
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Also by Efrat Lachter
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 29 articles by Efrat Lachter →

Topics

China Iran Natanz Russia Washington

Subjects

Iran GPE · 8× Trump PERSON · 4× Natanz GPE · 3× Washington GPE · 3× Ben Taleblu PERSON · 2× Iranian NORP · 2× Tehran GPE · 2× China GPE · 1× Donald Trump PERSON · 1× Russia GPE · 1×

Narrative

"And in the meantime, what they can do is show that they mean business by burying the entrances." The Pickaxe findings came alongside signs of reconstruction at another sensitive Iranian facility. In a separate report Thursday, the institute said Iran was "rapidly moving forward" with reconstruction of Taleghan 2 at the Parchin military complex southeast of Tehran.
framing: assertive · carried by 1 article(s) · first seen 2026-09-17
🔮 "I would advise Iran not to get cute because we will have to hit them very hard."

Claims (39 extracted, 6 hedged)

New satellite imagery shows Iran has added new defenses around tunnel entrances at Pickaxe Mountain, the deeply buried nuclear-linked site President Donald Trump has repeatedly threatened to strike, as Russia and China on Thursday vetoed a U.S.-drafted Security Council resolution aimed at preserving international monitoring of sanctions on Tehran. asserted
Russia → show → Tehran
The Institute for Science and International Security said in a report released Thursday that satellite imagery from Sept. 11 shows earthen roadblocks remain in place on roads leading to Pickaxe Mountain’s western tunnel portals near the Natanz nuclear complex. asserted
roadblocks → say → complex
The institute said the continued restricted access reinforces its assessment that the facility is not currently being used for normal operations, while assessing that valuable equipment or materials remain inside. asserted
equipment → say → operations
The report also identified additional soil placed over one western tunnel portal and over a nearby cluster of entrances first built in 2007. asserted
report → identify → 2007
The institute said the added soil increases the amount of earth protecting the entrances and helps harden them against aerial bombardment. asserted
soil → say → bombardment
The findings come one week after Trump issued his latest warning over Pickaxe Mountain. asserted
Trump → come → Mountain
"We notice there’s a little activity at Pickaxe," Trump told reporters last week. asserted
Trump → notice → reporters
"I would advise Iran not to get cute because we will have to hit them very hard." asserted
we → advise → them
Trump has repeatedly raised the possibility of attacking the site. asserted
Trump → raise → site
In a July 28 "Fox & Friends" interview highlighted by the White House, Trump said the U.S. was watching Pickaxe closely and knew "exactly what’s going on," adding that Washington could "take out Pickaxe" if diplomacy failed. uncertain
diplomacy → highlight → Pickaxe
Pickaxe Mountain lies roughly two kilometers from Natanz and features multiple tunnel entrances leading into a deeply buried underground complex. asserted
Mountain → lie → complex
Construction began in 2020 following sabotage that damaged an advanced centrifuge assembly facility at Natanz, and Iranian officials subsequently said a replacement underground facility was being built for advanced centrifuge production. asserted
facility → begin → production
Analysts estimate portions of the facility may be buried at least 100 meters beneath the mountain. uncertain
portions → estimate → mountain
Iran has said there is no nuclear activity at the site. asserted
Iran → say → site
Behnam Ben Taleblu, senior director of the Iran program at the Foundation for Defense of Democracies, told Fox News Digital that some analysts believe the opportunity for a straightforward strike on Pickaxe Mountain may already have passed. uncertain
opportunity → tell → Mountain
"The window to strike Pickaxe Mountain, according to some, has already expired because the regime has dug an underground nuclear facility several times deeper than Fordow," Ben Taleblu said. uncertain
Taleblu → strike → Fordow
But he argued that Washington retains military options even if destroying the underground complex itself proves difficult. asserted
destroying → argue → complex
"Washington can do what it’s traditionally been able to do with sites that are underground, hardened and fortified, and that’s to bury their entrances and raise the political cost to the Islamic Republic of being able to dig out," he said. asserted
he → do → Republic
"While there may not be the perfect munition just yet, Uncle Sam always has a bigger bomb," Ben Taleblu added. uncertain
Taleblu → have → bomb
"And in the meantime, what they can do is show that they mean business by burying the entrances." The Pickaxe findings came alongside signs of reconstruction at another sensitive Iranian facility. In a separate report Thursday, the institute said Iran was "rapidly moving forward" with reconstruction of Taleghan 2 at the Parchin military complex southeast of Tehran. asserted
Iran → show → Tehran
Vantor Technologies satellite imagery from Sept. 13 shows Iran erected a tarp over the destroyed hardened facility, obscuring work underneath from satellite or aerial observation, while dump trucks, bulldozers, concrete equipment and cranes were active around the site. asserted
trucks → show → site
The institute said Iran also built new concrete reinforcement that could provide additional protection against aerial attack. uncertain
that → say → attack
Taleghan 2 was struck by Israel in October 2024 and again in March 2026 after Iran had rebuilt and hardened the facility. asserted
Iran → strike → facility
The institute said significant questions remain about Tehran’s plans for the site. asserted
questions → say → site
The military developments unfolded alongside a separate confrontation over Iran at the United Nations. asserted
developments → unfold → Nations
Russia and China on Thursday vetoed a US-authored Security Council resolution that would have extended for another year, until September 2027, the mandate of the Panel of Experts supporting the 1737 Iran Sanctions Committee. asserted
that → veto → Committee
The measure received 11 votes in favor, while Pakistan and Somalia abstained. asserted
Pakistan → receive → favor
The panel investigates alleged sanctions violations and reports on implementation. asserted
panel → investigate → implementation
The dispute reflects a deeper split over whether UN sanctions suspended under the 2015 nuclear agreement were legally restored through the "snapback" mechanism. asserted
sanctions → reflect → mechanism
Most Council members maintain that the sanctions and related monitoring structures were revived, while Russia and China reject the legal and procedural validity of that position. asserted
Russia → maintain → position
A day before the vote, U.S. Ambassador to the UN Mike Waltz told reporters in New York that Washington considers the sanctions legally restored. asserted
sanctions → tell → York
"The snapback sanctions … occurred, the United States and this UN Security Council followed appropriate procedures for that to occur," Waltz said Wednesday at a news conference attended by Fox News Digital. asserted
Waltz → occur → Digital
"Those sanctions are in place and we expect those who are a party to fully enforce those sanctions. asserted
who → expect → sanctions
Waltz said the expert panel is important because sanctioned companies and individuals can attempt to evade restrictions by changing names and corporate structures. asserted
companies → say → names
"The president has been clear and the world community has been clear with resolution after resolution that the Iranian regime cannot have a nuclear weapon," Waltz said. asserted
Waltz → say → weapon
Thursday also brought fresh UN scrutiny of both Washington and Tehran. asserted
Thursday → bring → Washington
An independent UN fact-finding mission said it had reasonable grounds to believe two U.S. strikes on civilian sites in Iran in February constituted war crimes, while separately concluding that Iranian authorities committed crimes against humanity during their crackdown on anti-government protests. asserted
authorities → find → protests
The mission is investigative rather than judicial, and its findings do not themselves constitute criminal judgments. asserted
findings → constitute → judgments
Fox News Digital reached out to Iran U.N. mission for comments but didn’t receive them in time for publication. asserted
Digital → reach → publication
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