Since the US bombed Iran's key nuclear sites last year, analysts say work has increased at a secret underground facility that could be used to restart Tehran's nuclear program.

Amid the growing scrutiny of Iran’s military and nuclear capabilities, a lesser-known but highly strategic aspect of its defense efforts has come to light: the use of the country’s rugged terrain to ...

The Pentagon says Iran’s supplying of short-range ballistic missiles to Russia is a "deeply concerning development" that threatens European security and shows how Iran’s destabilization efforts are ...

Iran has depleted its stockpile of medium-range missiles, U.S. officials say. But the country still has an ample supply of other weapons, including rockets and attack drones. By Julian E. Barnes and ...