Nearly a week after Israel's surprise attack on Iran, Supreme Leader Ayatollah Ali Khamenei said Wednesday that Iran will "NOT surrender," as Israel seeks to eliminate its nuclear program. "War will be met with war,

As the US weighs joining Israel’s assault on Iran, questions are mounting over whether such an intervention could trigger regime change in Tehran – an outcome that risks splintering the country and sending shockwaves across the region.

Iran’s supreme leader crushed internal threats during more than three decades in power. Ayatollah Ali Khamenei entrenched the system of rule by Shiite Muslim clerics.