On June 16, the International Atomic Energy Agency (IAEA) said that all of the 15,000 centrifuges operating at Iran’s largest uranium enrichment facility in Natanz had likely been destroyed.

A day before the Israeli attack, on June 12, the IAEA censured Iran, declaring it was not in compliance with its non-proliferation obligations. It was the first time the agency had censured Iran in 20 years. The last time was in 2005. Iran responded with defiance, saying it would “launch a new enrichment center in a secure location and replace the first-generation machines” at another site where it would modernize the equipment.

Just prior to the attack, the IAEA had estimated that Iran has more than 400 kilograms of 60%-enriched uranium—enough for about 10 bombs.

Following the Israeli strike, IAEA chief Rafael Grossi told CBS News on June 28 that some of the enriched uranium may have survived; that Iran retained its “industrial and technological capacities” and could start enriching uranium again “if they so wish.”

However, David Albright, founder and president of the Washington, D.C.-based Institute for Science and International Security, told JNS in early July that while it's difficult to assess how far back the Israeli strike pushed Iran's nuclear program, it would be “many years” before the Islamic Republic could launch a nuclear warhead.