U.S. Announces Urgent Worldwide Travel Warning for Americans

The U.S. Department of State issued an urgent warning for Americans to "exercise increased caution" worldwide.

The alert was issued in the wake of the U.S. airstrikes on Iran, which killed the country's supreme leader.

"Following the launch of U.S. combat operations in Iran, Americans worldwide and especially in the Middle East should follow the guidance in the latest security alerts issued by the nearest U.S. embassy or consulate," the U.S. State Department wrote on February 28.

"They...