The U.S. struck Fordow, roughly 60 miles south of Tehran, as well as the Natanz complex to the southeast and Isfahan, southwest of Natanz, Trump said. The president hailed the attacks as a "spectacular military success," adding: "Iran's key nuclear enrichment facilities have been completely and totally obliterated."

The world grappled Sunday with the enormous implications after the United States inserted itself into Israel's war against Iran with an attack that raised urgent questions about what remained of Tehran’s nuclear program and how its weakened military might respond.

Iran and Israel traded air and missile strikes as the world braced on Monday for Tehran's response to the U.S. attack on its nuclear sites and U.S. President Donald Trump raised the idea of regime change in the Islamic republic.