Israel has been targeting Iran's nuclear infrastructure, with a key focus on its underground uranium enrichment plants. Its Natanz facility, in the centre of the country, has sustained severe damage, according to the International Atomic Energy Agency (IAEA).

“Iran already has enough highly enriched uranium to build several nuclear weapons,” says the Middle East Institute’s Pollack. “This is containerised and believed to be stored at three different locations, and it is unclear whether Israel will be able to destroy all of it in the ongoing military strikes.”

As Israel aims to take out Iran's nuclear facilities, could this US 'bunker buster' bomb play a role? What to know.