Lufthansa ground staff of Frankfurt Airport stage a warning strike over 9.5 % pay claim by Germany's public sector workers union Verdi, prompting the cancellation of more than 1,000 flights and adding to travel disruptions during the busy summer travel season in Frankfurt, Germany, Juli 27, 2022. The move had prompted Lufthansa to cancel nearly all flights at its Frankfurt and Munich hubs for Wednesday. REUTERS/Frank Simon