US ready to take 'immediate' action after Ethiopia plane crash

US regulators on Monday ordered Boeing to make urgent improvements to the best-selling jet involved in a deadly Ethiopia plane crash -- but ruled out grounding the fleet as investigators worked to piece together the aircraft's final moments. The Ethiopian Airlines Boeing 737 MAX 8 crashed minutes into a flight to Nairobi on Sunday, killing all 157 people on board and prompting airlines across the world to begin withdrawing the model from schedules. The US Federal Aviation Administration (FAA) said it was working with local authorities and the National Transportation Safety Board and may soon share safety information concerning the aircraft.