NEW : Officials will investigate de-icing fluid shortage . Christmas Day brings smoother operations at Charles de Gaulle Airport . About a foot of snow falls on the de Gaulle roof , forcing a partial evacuation . — The National Weather Service has issued an ice advisory for New York City and Long Island.
NEW : Officials will investigate de-icing fluid shortage . Christmas Day brings smoother operations at Charles de Gaulle Airport . About a foot of snow falls on the de Gaulle roof , forcing a partial evacuation . European airports are recovering from long delays .