Reza Pahlavi, Iran's exiled crown prince, has warned Iran's Supreme Leader Ayatollah Ali Khamenei of a Nuremberg-like Nazi trial as uneasy calm returned in Tehran after a wave of protests that drew a bloody crackdown.

Fox News chief foreign correspondent Trey Yingst has the latest on tensions between Iran and the U.S. on 'The Story.'

The death toll in Iran amid protests and tensions has climbed to 4,029, most of them protestors, activists reportedly said on Tuesday.

Nationwide protests in Iran are putting new pressure on its theocracy as the country faces an economic crisis.

People believe that some kind of toxic chemical substance has been used against protestors, causing some of the injured to lose their lives days later,” said former UK lawmaker Bill

Exiled Iranian crown prince Reza Pahlavi outlined his 6-step plan to exert international pressure on the regime, describing it as being "close to collapse"

Iranians made phone calls abroad for the first time in days Tuesday after authorities severed communications during a crackdown on nationwide protests that activists say killed at least 646 people.

The regime may have been able to crush the latest wave of protests using its tried-and-tested playbook of repression. But the fundamental grievances animating protesters haven’t gone away.

Farah Pahlavi was frequently called one of "Val's Gals," women who relied on Valentino's designs for their most significant occasions

In the wake of spiraling tensions between the United States and Iran over Tehran’s violent crackdown of protests, analysts warn that internal upheaval or a potential collapse of the Iranian government could carry nuclear risks.