PRAGUE - DECEMBER 11: Ground crew of Czech Airlines Handling provides de-icing. They are spraying the aircraft, which prevents the occurrence of frost on December 11, 2012 in Prague, Czech Republic.
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PRAGUE - DECEMBER 11: Ground crew of Czech Airlines Handling provides de-icing. They are spraying the aircraft, which prevents the occurrence of frost on December 11, 2012 in Prague, Czech Republic.