President Trump declined to say whether the U.S. would strike Iranian nuclear facilities, moments after Iran's supreme leader warned the U.S. against an attack and rejected Trump's call to surrender.

The departure adds to a string of recent personnel changes at the Department of Homeland Security, a year into President Trump's administration.

Pope Leo XIV's four-nation, 11-day trip to Africa is so dizzying in its complexity it recalls some of the globetrotting odysseys of St. John Paul II in his early years.