Fearing a Ground Invasion, Iran Seals Off Isfahan Nuclear Tunnels

New high-resolution commercial satellite imagery shows Iran has further fortified the underground tunnel complex at its Isfahan nuclear facility. According to an analysis released yesterday (April 9, 2026) by the Institute for Science and International Security (ISIS), images taken on April 8 reveal makeshift roadblocks and added physical barriers now installed directly in front of all three tunnel entrances. These include earth berms, debris, fencing, and other obstacles specifically designed to slow or prevent ground access. The entrances themselves were already completely buried with soil back in February. ISIS assesses this is not preparation to reopen the site for operations,...