By Michael Drummond, foreign news reporter
Israel hit more targets in Iran overnight, including multiple nuclear facilities.
The Israeli military said it targeted the Khondab nuclear reactor in Iran's Arak, including its partially built heavy-water research reactor.
Heavy-water reactors pose a nuclear proliferation risk because they can easily produce plutonium, which can be used as the core of a nuclear bomb.
The IDF said it also struck a site in the area of Natanz, one of Iran's uranium enrichment plants.
However, despite days of Israeli strikes on infrastructure associated with Iran's nuclear programme, it appears that much of Iran's deeply-buried nuclear apparatus may remain intact.
At Natanz, Israel has been unable to breach the subterranean hall of centrifuges, but damage to its power supply is thought to have caused serious damage to the centrifuges indirectly.
At Fordow, the secretive enrichment plant buried deep beneath a mountain, it's thought that only America's GBU-57, a 14-ton bunker buster bomb is powerful enough to destroy the facility.
It's understood that it can penetrate about 200ft (61m) below the surface before exploding.
But analysts say it can only be delivered from a US B-2 stealth bomber. Its 30,000lb (13,600kg) weight means that its sheer kinetic force enables it to reach deeply buried targets.
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