Clock is Ticking For Iran to Open Strait of Hormuz

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Here is your Morning Brief for Monday, March 23rd. I'm Luke Vargas for The Wall Street Journal. Iran has just hours left to open the Strait of Hormuz or face U.S. attacks on its power plants.

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President Trump issued that ultimatum over the weekend, with Iran in turn threatening to attack energy, water, and IT infrastructure across the Middle East. That promised reprisal has led Gulf states to try and talk the U.S. out of the plant attacks, though it's unclear if those appeals are getting through.

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Qatar is reporting that attacks on its largest LNG plant last week could take years to repair.

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and will cut annual helium exports by some 14 percent. The gas is a critical component in semiconductor manufacturing.

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Two pilots have been killed after an Air Canada Express plane arriving from Montreal collided with a firefighting vehicle shortly after landing at New York's LaGuardia Airport.

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The Port Authority of New York and New Jersey said that the firefighting vehicle was responding to a separate incident just before midnight. There were 72 passengers and four crew members aboard the plane, with photos showing the front end of the plane sheared off near its front doors. The Federal Aviation Administration says LaGuardia will remain closed until at least 2 p.m. this afternoon.