European authorities banned the planes from the air, joining regulators in China, Indonesia, Singapore, India and Australia, as well as numerous airlines. Roughly two-thirds of the 737 Max 8 aircraft in the world are now grounded.

President Trump spoke with Boeing yesterday, shortly after he had tweeted that airplanes were becoming “far too complex to fly.” In a conversation with Dennis Muilenburg, the company’s C.E.O., Mr. Trump was reportedly reassured about the safety of the Max 8 jets.

The F.A.A. stands firm on its decision not to ground the aircraft, saying that it found “no basis” to do so. Elaine Chao, the U.S. transportation secretary, said that she and the F.A.A. would “take immediate and appropriate action” if necessary. (She also flew on a Max 8 yesterday.)

But others disagree. Ray LaHood, a former secretary of transportation who grounded Boeing’s 787 Dreamliner in 2013 following fires in its lithium-ion batteries, said that it was the F.A.A.’s duty to ground the jets “until there is 100 percent assurance” of safety. Scott McCartney of the WSJ writes that the Department of Transportation, which is home to the F.A.A., has “shown a pattern of lax regulation” recently.

Britain gently joins the Big Tech antitrust assault

The U.K. has joined the growing army of voices calling for checks on the power of Big Tech, with a government report that calls for an overhaul of antitrust policies. It was prepared by a panel led by Jason Furman, who was a top economic adviser to President Barack Obama. More on the news from Adam Satariano of the NYT:

• “The 150-page report, ordered by the chancellor of the Exchequer, Philip Hammond, the country’s top Treasury official, said the country needed stricter rules on acquisitions in the technology industry and stronger oversight to make sure that new rivals cannot be squashed.”

• “Mr. Furman’s panel called for the creation of a ‘digital markets unit’ that would require companies to allow consumers to move data from one service to another. Large companies would also have to make data available to competitors, a bid to lower barriers to entry by forcing them to share information.”

• “The report also calls for a code of conduct to be drafted for the biggest tech companies that would be enforceable with fines.”