Hundreds of flights have been cancelled in Germany on Thursday amid a one-day strike by aviation security workers at 11 airports across the country. The strike forced the closure of security checkpoints at all 11 affected airports, meaning no travellers could enter the airport and board flights. But the impact of the strike on flight operations, which began in the early hours of Thursday at most of the airports, varied widely. The airports hit by the strike are Frankfurt, Hamburg, Bremen, Berlin, Leipzig, Dusseldorf, Cologne, Hanover, Stuttgart, Erfurt and Dresden. At Germany’s busiest airport…