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- Workers at airports including Munich, Hamburg and Frankfurt went on strike Friday.
- Nearly 300,000 passengers have been affected, according to CNN.
- After an IT outage Wednesday, this is the latest nightmare for German airline Lufthansa.
Lufthansa canceled more than 1,300 flights Friday, compounding a week of nightmares for travelers using the major European airline.
Workers at seven German airports, including Munich, Frankfurt, and Hamburg, took collective action Friday, according to CNN. The full-day strike halted Lufthansa's operations in Frankfurt and Munich Friday, affecting thousands of would-be passengers.