A reactor in Tehran is a monument to the U.S. relationship with Iran when the country was led by a secular, pro-Western monarch.

Nuclear policy specialist David Albright told Nature how his organization is monitoring for damage to nuclear sites following US and Israeli strikes.

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.