Trump threatens strike on Iran’s Jabal al-Fass nuclear site

Iran’s Jabal al-Fass has returned to the spotlight after US President Donald Trump threatened to target the site, amid American concerns over renewed activity at the heavily fortified location near the Natanz nuclear facility.

Trump stated that the United States had detected “some activity” at the site, warning Tehran against continuing work there and suggesting Washington might be forced to launch a powerful strike. The warning comes as the US and Israel continue to pressure facilities linked to Iran’s nuclear program.

Where is Jabal al-Fass located?

The mountain is in Isfahan province, about 220 kilometers south of Tehran and close to the Natanz uranium enrichment complex. Jabal al-Fass contains two tunnel complexes dug deep into the mountain, making it one of the most fortified and difficult-to-target sites in Iran.

What is inside?

The exact nature of the facility inside the mountain remains unclear, but expert analyses and specialized centers have suggested several possibilities. These include uranium enrichment, centrifuge manufacturing, or other underground nuclear activities.

Satellite images analyzed by experts indicate ongoing construction at the site, but publicly available information has not confirmed that any potential enrichment facility inside has become operational. Iran maintains that its nuclear program is for peaceful purposes.

Why is it difficult to target?

Jabal al-Fass’s significance for Washington lies in its location and fortifications. The facilities are protected by thick layers of rock deep within the mountain, making them much harder to reach than above-ground sites.

For this reason, the site poses a military challenge for the United States. Success would depend not only on reaching the tunnel entrances but also on whether the weapons used could penetrate the fortifications and reach the facilities inside.

Has Washington developed a new weapon to strike it?

US reports have revealed preparations to test secret capabilities at an underground facility at the White Sands Missile Range in New Mexico, amid speculation that the test is linked to potential conflict with Iran and the need to target deeply buried sites.

However, there is no public confirmation that the US has developed a new weapon specifically for Jabal al-Fass, nor is it clear whether the test has taken place or what capability was to be tested.

Why is the site back in focus now?

Trump’s threats come as US concerns grow over Iran rebuilding its nuclear capabilities, following strikes on other Iranian nuclear sites during the current conflict.

Jabal al-Fass appears to occupy a unique place in US military calculations due to its continued protection underground, making it a likely target if Washington decides to expand strikes against Iran’s nuclear infrastructure.