Germanwings owner Lufthansa Group, in coordination with industry and government regulators, adopted a rule

in which "two authorized persons must be present in the cockpit at all times during a flight," according to the airline group, which also owns Austrian, Brussels and Swiss airlines. Based on various media reports, airlines across the world—including easyJet, Air Canada, Norwegian and Virgin Atlantic—have adopted such rules in the wake of a Germanwings crash this week, purportedly at the hands of a co-pilot who locked himself in the cockpit. Government authorities from Europe to Canada also are reported to have initiated or are considering such a requirement of carriers, already effective in the United States.