More than half of all flights at Munich Airport are set to be cancelled on Wednesday due to a strike by Lufthansa ground staff as part of an ongoing wage dispute. Some 400 take-offs and landings of the 730 flights normally operated by all airlines will be affected, the airport announced. These are almost exclusively flights operated by Lufthansa and its partners, it said. Terminal 2 was therefore very quiet. Terminal 1, on the other hand, was operating normally. The Verdi trade union has also called on ground staff in Frankfurt, Hamburg, Berlin and Dusseldorf to go on strike. Lufthansa has can…