CNN reported that during 2026, there was a sharp surge in construction at the 'Mountain of Mashing' in Iran. The report is based on satellite imagery from the Center for Strategic and International Studies (CSIS) obtained by the American network. CNN's report noted that the surge occurred alongside the war and that a team of experts analyzed satellite images spanning six years. The 'Mountain of Mashing' is a nuclear site that has remained unscathed in the last two wars with Iran. It is located in the Zagros Mountains, very close to the nuclear facility in Natanz, where Iran has been digging an underground facility for six years. Experts estimate it may be resistant even to the most powerful bunker-buster bombs.