The new leader of the Islamic regime will be Khamenei’s son Mojtaba. President Trump has called him an “unacceptable” option.

Before the war in Iran erupted, the Bank of England was widely predicted to be set to cut interest rates in March or April. Don't count on it, economists say.

Trump warned Saturday that Iran would soon "be hit very hard," adding that the U.S. may expand its target list to "new areas and groups of people."

Follow live NBC News coverage and latest updates as Trump says oil price rises are a small price to pay, Iran names Mojtaba Khamenei supreme leader, and Israel strikes Tehran and Lebanon.

Oil prices plunged after Trump warned that Tehran would be hit "twenty times harder" if it attempted to halt oil flows through the Strait of Hormuz.

A US soldier died after sustaining injuries during an attack last week in Saudi Arabia, the military said, bringing the number of American troops killed in the Iran war to seven.

Recovering Iran’s remaining highly enriched uranium stockpile that is believed to be sitting in a storage facility deep underground, an objective the Trump administration has been discussing, would require a significant number of US ground troops beyond a small special operations footprint,