A wave of strike action has brought Germany to a standstill in recent weeks, as Europe's largest economy has struggled for growth and consumers have felt the pinch from sky-high inflation.
Rail, bus and airport workers have walked out one after another amid bitter salary negotiations in a country that usually prides itself on good labour relations.
The latest industrial action by airport ground staff on Wednesday led to the cancellation of 90 percent of Lufthansa flights, according to the Verdi union. At Germany's biggest airport in Frankfurt, 500 of the day's 1,100 planned flights were cancelled.