The U.S. will take all actions necessary – "diplomatic and otherwise" – to deter Iran from disrupting Gulf energy supplies, U.S. Secretary of State Mike Pompeo warned on Sunday.
President Trump denied that the U.S. is seeking regime change in Iran, days after ordering 1,500 additional U.S. troops to the region.
A senior German diplomat headed Thursday to Tehran to press Iran to continue to respect the landmark nuclear deal, despite the unilateral withdrawal of the U.S. and increasing pressure from Washington.
The sudden eruption of political unrest in Iran has presented an unforeseen challenge to Tehran's ascendant influence in the Middle East, potentially threatening Iran's claims to regional hegemony just when it seemed to have secured an unassailable role.
The protests that have broken out across Iran in recent days have generated remarkable excitement about the possibility of revolutionary change. The demonstrations, the largest since the crushing of the 2009 Green Movement, have surprised virtually all observers.
Iran was holding 10 U.S. Navy sailors and their two small Navy boats after the boats had mechanical problems and drifted into Iranian waters.
Thousands of Iranians burned the American flag Wednesday as they marked the anniversary of the seizure of the U.S. Embassy in Tehran 36 years ago.