Investigators from the United States and elsewhere have arrived at the scene of a deadly Ethiopian Airlines crash, in which 157 people were killed on Sunday during a flight from Addis Ababa, Ethiopia, to Nairobi, Kenya. Much of the investigation will focus on the so-called black boxes — voice and data recorders that were recovered on Monday.

Several more airlines on grounded their Boeing 737 Max 8 planes on Monday and Tuesday, increasing to 23 the number of companies that have taken the aircraft out of service. The Max 8, a new fuel-efficient version of Boeing’s most popular aircraft, has crashed twice in five months, leading to concerns about its safety.

Boeing stands by the airworthiness of the plane but said that it planned to issue a software update and was working on changes to its flight controls and training guidelines.

Source: The New York Times