A traveler wearing a protective mask walks past an American Airlines Group Inc. plane. (Photographer: Andrew Harrer/Bloomberg)
(Bloomberg Businessweek) -- Just a month ago, airlines around the world began adding flights as national lockdowns eased and people craved an escape from hibernation. But as the travel season reaches what should be its annual peak, hopes for an industry rebound have been dashed by flareups of the pandemic in Asia, a deepening health crisis in the Americas, and the reimposition of flight curbs in Europe. As a result, the aviation w...