Zuckerberg’s very bad week

Mark Zuckerberg has had a very bad week, even in the context of a very bad year. It started with a proposal by Senator Elizabeth Warren to break up Facebook. Next came a huge network outage, news of a widening federal criminal probe of its data-sharing practices and the departure of two key executives. But all of that paled in comparison with how the embattled social-media platform was used to livestream the massacre of 49 people in New Zealand.

Boeing is in crisis, but it can’t afford to give up on the 737. The world awaits the contents of the black box, but a device found in the Ethiopian airliner’s wreckage has given an early clue as to what went wrong.