Donald Trump declared this weekend that his bunker-busting bombs 'obliterated' Iran's nuclear facilities and erased the Islamic Republic's chances of building a bomb.

But despite his triumphant bluster, Iran still likely boasts significant stockpiles of highly enriched uranium (HEU) and could well have other facilities lying in wait to reach purity levels required to fashion nuclear warheads.

In May, the UN's nuclear watchdog, the International Atomic Energy Agency (IAEA), reported that Iran had accumulated more than 400 kilograms (900 lbs) of uranium enriched to 60%.

This is already enough to create an atomic weapon like those that laid waste to Hiroshima and Nagasaki.

Such bombs are too heavy and cumbersome for Iran to deploy effectively. But achieving the 90% enrichment required to produce modern nuclear devices small and light enough to mount to any one of Tehran's vast array of missiles could take mere weeks.