1. The U.S. and Canada, some of the last holdouts, grounded all Boeing 737 Max 8 jets in the wake of a crash. That essentially pulls the plane from almost everywhere in the world. Above, a Max 8 at La Guardia Airport in New York on Tuesday.

Though no cause in the Ethiopian Airlines crash has been determined yet, one of the pilots reported “flight-control problems” to air traffic controllers, requesting permission to turn back minutes before the crash.

President Trump issued the ban himself, reversing an earlier decision by American aviation regulators to keep the planes in service. Boeing said it supported the decision to ground the planes. One big open question for the American company: What happens to the 5,000 open orders for the Max 8 jets?