Analysts report surge at Iran suspected nuclear site

Construction activity at Iran's suspected Pickaxe Mountain nuclear facility has significantly increased in 2026, according to analysts who have reviewed satellite imagery. The underground site, located near the Natanz nuclear complex, is believed by experts to be a potential safe haven for Iran's nuclear program. The Center for Strategic and International Studies (CSIS) noted a "clear surge in construction activity" this year, detailing the hardening of tunnel portals, paving of internal roads, and reinforcement of access areas. CSIS analysts assess that the facility is likely intended to shield Iran's nuclear program but is not yet capable of enrichment, if that is its purpose. The assessment is based on six years of satellite imagery analysis. Israeli intelligence has suggested that Iran may have moved thousands of nuclear centrifuges to the site, particularly in the past fall, as part of uranium enrichment efforts. However, CSIS stated that its evidence cannot confirm or refute these claims. Amidst the ongoing construction, the United States has been evaluating and developing advanced capabilities to strike deeply buried underground facilities.