Lufthansa canceled just under half of its long-haul flights planned for Tuesday after pilots’ union Vereinigung Cockpit (VC) called an all-day strike in a long-running dispute over pay, retirement benefits and cost cuts. The union said on Monday the strike, the 13th walkout in 18 months, would affect long-haul passenger flights and cargo flights out of Germany from 0600 GMT to 2159 GMT on Tuesday. Lufthansa is trying to cut costs as it battles to maintain market share against budget rivals such as Ryanair.