The death of Ayatollah Ali Khamenei, who ruled his nation with an iron fist for nearly 37 years, raised the prospect of chaos and a power vacuum in an already turbulent region.

Iran’s supreme leader was killed in an Israeli airstrike. It’s not clear what will happen next. Here’s the latest.

Ayatollah Ali Khamenei, Iran's supreme leader, had maintained enmity to the U.S. and Israel for more than three decades.