National Review:

U.S. airstrikes would likely not be able to reach an underground Iranian nuclear facility being built near the Zagros Mountains in central Iran, according to experts and satellite imagery analyzed by the Associated Press. Photos and videos from Planet Labs PBC, a satellite-imagery provider, reveal the construction of a new underground facility at Iran’s pre-existing Natanz nuclear site, which has been sabotaged by repeated attacks by Western powers because of its atomic program. In 2021, an Iranian official said that thousands of nuclear-material-refinement machines were damaged in an act of “nuclear terrorism” that it blamed on Israel. Iran warned that it would replace affected centrifuges, which refine or enrich uranium for nuclear usage, with more advanced ones. U.S. intelligence officials had told the New York Times that an explosion destroyed the site’s internal power system, necessary to supply the centrifuges in the underground facility, estimating that enrichment activities would need nine months to be restored. In 2020, explosives hidden inside a table were also used to attack Natanz. 

The recent satellite images show that Iran has been digging tunnels in the vicinity of the site, with the purpose of building a nuclear facility too deep underground to be penetrated by U.S. bunker busters, last-ditch weapons designed to destroy underground sites. 

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