A plane of Lufthansa's low-cost subsidiary Germanwings is pictured on August 28, 2014 at Cologne's airport. Pilots of Lufthansa's low-cost subsidiary Germanwings are to strike on August 29 in pursuit of their demands for better early retirement provisions, their union announced on Thursday.    AFP PHOTO / DPA / HENNING KAISER /  GERMANY OUT        (Photo credit should read HENNING KAISER/AFP/Getty Images)
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