Former Ambassador-at-Large Nathan Sales and former naval aviator Gregory Glaros discuss CENTCOM’s announcement that the U.S. blockade in the Strait of Hormuz is being ‘fully enforced’ on ‘The Sunday Briefing.

The Strait of Hormuz has been a flashpoint since the US-Iran war started more than two months ago after the US struck several key Iranian sites and Iran retaliated

What could the United States' blockade in the Strait of Hormuz look like and what impact might it have? Here's what to know.

China stands to be impacted first, as the main buyer of Iran’s crude oil. But if the blockade drags on, its knock-on effects could impact the whole world.

The announcement comes hours after a merchant ship reported being attacked by multiple "small" boats near the Strait of Hormuz.

President Donald Trump said his representatives are having “positive discussions” with Iran as the two countries trade peace proposals. Meanwhile, the average cost of gas in the US rose to $4.45 a gallon.

Iranian foreign ministry spokesman Esmaeil Baghaei said Iran is still looking over a proposal from the U.S. regarding an end to the war, adding that Tehran will not respond to “deadlines or ultimatums" and that those "mean nothing.

The U.S. conducted strikes against at least two locations in Iran on Thursday, a U.S. official said. The strikes in Bandar Abbas and Qeshm Island were defensive, the official said, and do not constitute a resumption of major combat operations against Iran.