Iran's underground enrichment site at Fordo was hit again Monday while Iran fired a salvo of missiles and drones at Israel and warned the United States that its military now has a “free hand” to attack American targets in the wake of the Trump administration's massive strikes on Iranian nuclear sites.

Iran has two known underground nuclear enrichment sites, the one Israel attacked on the first day of its assault at Natanz, and another at Fordo. Both sit south of Tehran in central Iran, but Fordo has long been the Iranian nuclear facility of most concern to international monitors and experts.