One incident that raised concern in recent days was the launch of an Iranian anti-aircraft missile toward a U.S. F-35 fighter jet that was providing cover to ships in the strait, a U.S. official said.

While the missile didn't come close enough to be a threat, it was a signal that Iran is trying to reconstitute its military capacity, according to the U.S. official.

Russia wants to turn Kyiv into a ghost town: Now, Putin will have a new strategy – a series of bombings of the capital,