Boeing 737 MAX safety record questioned after two tragedies

For the second time in less than six months, a Boeing 737 MAX 8 has crashed minutes after takeoff and killed everyone on board, raising fresh questions about the safety of a model that is crucial to the US giant's future plans.On Sunday, the 157 passengers and crew members of a 737 MAX operated by Ethiopian Airlines were killed.China -- an important market for Boeing -- became the first country to ground the 737 MAX 8 on Monday.