The trade union Verdi announced a 27-hour strike of Lufthansa ground staff at major German airports starting on Tuesday morning. The strike will hit Lufthansa in Frankfurt, Munich, Hamburg, Berlin, Dusseldorf, Cologne-Bonn and Stuttgart beginning at 4 am (0300 GMT) on Tuesday and ending at 7:10 am on Wednesday, the union said. All ground staff – from aircraft maintenance to passenger assistance – have been called to strike, Verdi said on Sunday, likely resulting in widespread flight cancellations and delays. The 25,000 ground employees are locked in a pay dispute with the Lufthansa Group. No a…