NEW : 18 passengers treated at scene after exposure to de-icing fluid . Fumes send seven Alaska Airlines crew members to the hospital . -- A plane carrying a group of Russian tourists crashes in northern Russia, killing all 19 people on board. Weather delays Christmas Eve flights across country .
NEW : 18 passengers treated at scene after exposure to de-icing fluid . Fumes send seven Alaska Airlines crew members to the hospital . AirTran jetliner skids off runway in Moline , Illinois , TV station reports . Weather delays Christmas Eve flights across country .