JAL aborted take off at Sapporo
 

Passengers flee plane after smoke fills cabin - BBC News

Why are all the passengers wearing surgical masks in the terminal?

Its Japanese culture to wear masks if you have a cold, to prevent other catching it. More a politeness thing that actual prevention. You would see it often in the street in winter.

Deiceing fluid in the airconditioning system?

Previous post - NOT on takeoff
 

Engine smoke forces evacuation of JAL plane in snow | The Seattle Times

Quote:
Kyodo said that the engine stalled after sucking in snow, and that there was an explosive sound when a pilot restarted it.
The Boeing 737 with 159 passengers and six crew members was bound for Fukuoka in southern Japan.

Doesn't seem to be much future in trying to go anywhere except back to the terminal in conditions like that though, does it?