The main risk inside the storage facility is the chemical toxicity of uranium hexafluoride gas and fluoride compounds generated in contact with water. The radiological risk from enriched uranium at Natanz is likely to be much smaller than the chemical toxicity from the fluorine.

After Israel's strikes, Iran retains its scientific expertise, and now has a stronger incentive to bury its program even deeper.

Vice President JD Vance said on Sunday the U.S. was not at war with Iran but at war with its nuclear program, adding the program had been pushed back by a very long time due to American strikes ordered by President Donald Trump.