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Currently Playing: Is this U.S. blockade Trump’s riskiest move yet? | About That

President Donald Trump announced the United States would apply its own blockade of the Strait of Hormuz in retaliation for Iran's de facto shutdown, which is now stretching into its seventh week. But, as Andrew Chang explains, responding this way to Iran's control of 20 per cent of the world's energy supply could pose several risks as the war in the Middle East escalates. Intro - 00:00 How to blockade a blockade - 01:12 CORRECTION (April 16, 2026): At 2:18 in this video, an aerial image used to illustrate the Strait of Hormuz was shown in error. In fact, the body of water visible in the photograph is the Clarence Strait, which is adjacent to the Strait of Hormuz. Images provided by The Canadian Press, Reuters, Adobe Stock and Getty Images »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@cbcnews Subscribe to CBC News on Snapchat: https://bit.ly/3leaWsr Subscribe to CBC News on WhatsApp: https://www.whatsapp.com/channel/0029Vb6MSjH9Bb63S9tbQa1Y Download the CBC News app for iOS: http://apple.co/25mpsUz Download the CBC News app for Android: http://bit.ly/1XxuozZ »»»»»»»»»»»»»»»»»» For more than 80 years, CBC News has been the source Canadians turn to, to keep them informed about their communities, their country and their world. Through regional and national programming on multiple platforms, including CBC Television, CBC News Network, CBC Radio, CBCNews.ca, mobile and on-demand, CBC News and its internationally recognized team of award-winning journalists deliver the breaking stories, the issues, the analyses and the personalities that matter to Canadians.