An earlier U.S. intelligence assessment reportedly found the attacks only set the program back by a few months.

Fordo is probably the most spied-on place on the planet - and work to understand what is happening there is set to intensify further.

Director of National Intelligence Tulsi Gabbard said that “new intelligence” showed that Iran’s nuclear facilities had been “destroyed” during last weekend’s U.S. military strikes. Gabbard didn't provide specifics about the intelligence she was citing or explain what she meant by destroyed,