https://phys.org/news/2019-03-max-disaster-boeing-crisis-mode.html > The tragedy of the Ethiopian Airlines flight on Sunday, in which all 157 people on board perished, renewed fears about the safety of the plane, and led to it being grounded worldwide—although the US decision was not made for three days. > "It's been a rough week for them," said Matt Yemma, a crisis communication specialist at Peaks Strategies, based in Connecticut.