Boeing’s CEO says it will take years for the airplane-manufacturing industry to return to levels it enjoyed before the coronavirus pandemic. Travel restrictions to limit the spread of the virus have slowed air travel to a trickle and caused airlines to park 2,800 jets and reconsider plans to buy new ones. CEO David Calhoun made the comments during Boeing’s annual meeting, which was conducted online. Shareholders elected the entire slate of 12 company-backed board nominees despite recommendations against five of them by proxy advisory firms, who faulted the board for poor oversight of the 737 Max. That’s the plane that was grounded after two deadly crashes.