Employees of German airline Lufthansa protest in front of the Lufthansa terminal at the Franz-Josef-Strauss Airport in Munich, southern Germany, on July 27, 2022 during a strike of ground staff. - German national carrier Lufthansa said it would have to cancel almost all flights at its domestic hubs in Frankfurt and Munich on July 27, 2022 because of a planned strike by ground crew, adding to a summer of travel chaos across Europe. (Photo by Christof STACHE / AFP)