Iran has intensified efforts to seal its enriched uranium stockpile by collapsing tunnels and mining access points, CNN reported; US intelligence sources say the move complicates any future transfer or destruction of the material and could help Tehran claim it cannot access the uranium

In recent weeks, Iran has dramatically escalated efforts to seal off its cache of near bomb-grade uranium, deliberately collapsing tunnels and booby-trapping entrances with…

Iran has significantly increased efforts in recent weeks to secure its stockpile of highly enriched uranium, according to a CNN report citing five sources familiar with US…