Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

People hold up Union of Public Service and Services flags as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers hold a banner which reads "I didn?t get to work badly as I get paid" as they strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A man waves a flag on a vehicle, as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A man waves a flag on a vehicle, as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A worker wears a jacket, with the words "Together there is more", as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A man waves a flag on a vehicle, as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A man waves a flag on a vehicle, as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers hold a sign which reads "Wage increase overdue - Inflation compensation now" during a strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers hold a flag which reads "Bold" during a strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers hold a flag which reads "I'm so angry I even wear a flag" during a strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers hold a banner which reads "We are worth it" during a strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

Workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of a flight schedule board at Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of a flight schedule board at Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of a flight schedule board at Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

A view of Frankfurt Airport as workers strike, after German trade union Verdi called on workers at Frankfurt, Munich, Stuttgart, Hamburg, Dortmund, Hanover and Bremen airports to go on a 24-hour strike, in Frankfurt, Germany February 17, 2023. REUTERS/Heiko Becker 

German Chancellor Olaf Scholz holds Lithium ore as he visits Federal Institute for Geosciences and Natural Resources in Hanover, Germany February 16, 2023. REUTERS/Fabian Bimmer 

German Chancellor Olaf Scholz visits Federal Institute for Geosciences and Natural Resources in Hanover, Germany February 16, 2023. REUTERS/Fabian Bimmer 

German Chancellor Olaf Scholz speaks with employees as he visits Federal Institute for Geosciences and Natural Resources in Hanover, Germany February 16, 2023. REUTERS/Fabian Bimmer