Several experts have cautioned that Iran likely moved a stockpile of near weapons-grade highly enriched uranium out of the deeply buried Fordow site before the strikes and could be hiding it.

The Pentagon on Wednesday sharpened its assessment of Iran's nuclear program, declaring that Iran's ability to build a nuclear weapon following the U.S. strike on its nuclear facilities is "closer to two years" away.

US airstrikes on Iran set back the country’s nuclear program by one to two years, a Pentagon spokesman said, adding to uncertainty around the status of the country’s facilities after President Donald Trump said they’d been obliterated.